Page 1 :
both A, , (, , c, , l, , e, , r, , have non-zcto, , and, , a, , t, , i, , 26., , Uing, , the, , i, , t, , graph,, , onc ati, , tpt, , n, , hth.4 and B, , have zCo aceeiation, , which has turned by 300in, bdywhich, , raKly, a, , a, , cine, , a), , ol, , radius ,, , distance, , travelled, , is, , T, , b)acveleralion is constant, , )both (a) and, , (6), , m, , e, , r, , n, , y, , g, , o, , -, , cqual to the displacement in (4-6), r, , o, , u, , n, , d, , is rotating about a, , the rate of 60 rev/min., ertical axis at, distance of a man trom its axis, , It the, , is2m,, , his, , linear, , speed is, , (c) 4rms, , Drops a, , stone, , from the, , are, , top of the, , building, , starts a clock., B: Simultaneously,, as the stone lands, C: Stops the clock, , on the ground., =, , is 2.5, , ms, , in OA and, , zero in AB., in time, , negative, , (a) Only A is correct, , (6) Only B is correct, (c) Only C is correct, (d) All the three are correct., 27. Three students A, B and C observing, line draw, an object moving in a straight, , graphs as given below:, , 1/2gr., , (b) A, C, B, D, (d) D, C, B, A, , (o) A, B, D, C, (c) A, B, C, D, , circle of radius r,, The ratio of, covers 3/4th of the circle., , moving in, , n, , A, , relationh, D: Follows the, , 4 A body, , B: Accelera, , (6-8) seconds., , a, the height of a building,, To find, the steps as given, student is following, , of the steps, below. The sequence, , seconds., , C: Acceleration is, , (b) 2 ms, (d) 27 ms, , (a) 1 ms, , A:, , 8, , A: Displacement in (0-4)seconds is, , () enly (a), A, , 6, , 4, , a, , B, , is, the distance to displacement, , 2/2, , ., , (a) 3T, , 22, , 2, , (d) 2/2, , m, 10 m in 5 seconds, 20, the last, next 10 seconds and 30 m in, , C, , A car travels, n, , 10, , seconds. The average, , speed of the, , motion is, , (a) 2.0 ms, c) 30 ms, , (b) 2.2 ms, (d) 2.4 ms, , them is, The incorrect among, (6) B, (a) A, , (c) C, , (d), , Both, , (b) and (), , Science 255

Page 2 :
28., , (i), , v, , =constant: Uniform, , motion, , 33. If the, , displacement, , of an, square of, , (iü) a = constant:, , proportional, , (a) non-uniformly accelerated, (6) uniformly accelerated, , the object moves with, , (a) uniform velocity, , (c) v * 0 at t = 0, , (6) uniform acceleration, , (d) circular motion., 29. A: A, , object is, , time, then, , (c) increasing acceleration, , body moving, circle has an, acceleration directed towards the, in, , a, , (d) decreasing acceleration, , [NCERT Exemplar Problem, , centre., , B: Uniform circular motion is, , an, , 34. From the, , given - t graph,, , inferred that the object is, , example of variable acceleration, C: Linear, velocity of a body, in, , to, , it can be, , moving, , circle differs with the distance, from the axis., a, , (a) A,'Band 'C' all are true statements., (6) 'A is true, 'B' is false and 'C' is true, (c), , statements., A, B' and 'C' all, , are, , (a) in uniform motion, (b) at rest, , false, , statements., (d) A is false, 'B' is true and 'C' is true, statements., 30. A particle is, moving in a circular path, of radius r. The, displacement after half, a circle would be, , (a) Zero, , [NCERT Exemplar Problem], (b) Tr, , (c) 2, 31., , (d) 277, , Abody is thrown vertically upward with, , velocity u, the greatest height h to which, it will rise is,, (a) ulg, (b) u"/28, , (c) u'ls, , (d) u/lg, , [NCERT Exemplar Problem), 32. The numerical ratio of, displacement to, distance for a moving object is, , (a) always less than 1, , (b) always equal to 1, (c) always more than 1, (d) equal or less than 1., , INCERT Exemplar Problem], , (c) in non-uniform motion, , (d) moving with uniform acceleration., 35., , [NCERT Exemplar Problem], boy is enjoying a ride on a, , Suppose a, merry-go-round which is moving with a, constant speed of 10 ms". It, implies, that the boy is, (a) at rest, , (b) moving with no acceleration, (c) in accelerated motion, (d) moving with uniform velocity., INCERT Exemplar Problem), 36. Area under, , graph represents a, physical quantity which has the unit, , (a) m 2, (c) m, , a, , v-1, , (b) m, , (d) ms, , INCERT Exemplar Problem, B, C and D are moving on, a levelled, road. Their distance versus, time graphs are shown in, figure. Choose, , 37. Four cars, A,, , the correct statement., , 256 gether with Competency Based and, Objective Type Questions-9

Page 4 :
45. The distance covered by a bus moving, with a speed of 36 km/hr in 15 minutes, , (a), , (b), , c), , d), , is, , (b) 9 Km, (a) 0.9 Km, (d) 900 Km, [DoE], (c) 90 Km, 46. Abody is thrown vertically upward with, velocity 'u', the greatest height "h, to, , which it will rise is,, 2, , (a), , )28, , 51., , (), , DoE], , Displacement, t=, , of, , 0s tot= 6s for, , body betweer, , a, , followin, , graph:, , 47. A car travels towards east at 10 m/s., After 10 minutes, it turns left and, , travels at 5 m/s for next 10 minutes. Its, average speed is, a) 20 km/h, (b) 24 km/h, (c) 27 km/h, (d) 30 km/h, 48. In what ways can acceleration be, produced in a body?, , (a) by change in speed only, (6) by change in direction only, c) by change in both speed and, direction, (d) by change in either speed or, direction, 49. A sprinter starts from rest and attains a, , velocity of 6 m/s in 10 s. His acceleration, , 2i, , (a) 4 m, (c) 5 m, , (6) 1 m, d) 3 m, , 52. A bus starts from rest and, accelerates, at, 0.2, m/s* for 4 minutes. Its, uniformly, final speed is, , (a) 12 m/s, , (c) 36 m/s, , (b) 24 m/s, d) 48 m/s, , 53. The direction of acceleration of a, body, executing uniform circular motion is, , (a) tangentially forward, , (a) zero, (6) -0.6 m/s, , (b) towards the centre, , (c) tangentially backward, , C) 0.3 m/s, , (d) away from centre, , (d) 0.6 m/s*, 50. The velocity-time graph, to following, , 0, , corresponding, , distance-time graph will be:, , 54. Which of the, , following, , is, , an, , example, , of negative acceleration?, , a) a body thrown up, , 6) a body falling down, , (C)an oscillating pendulum, (d) a body in uniform circular motion, , 258, , 7agether with, , Lompetency Based and Ubjective Type Questions-

Page 5 :
T h e, , reatest value of acceleration is, , g r e a t e s tv a l, , T s e d by which of the following, pOSses:, , bodies?, , A plane, , accelerating at 5 m/s*, , ADerson accelerating at 5 km/h, , b) A, , A car, , accelerating at 5 m/min?, , acceleration,, All have equal, of reach his, takes 8 minutes, A boy, so. s c h o o l b y c a r . If the school is 4.8 km, , house, his average speed, , awayfrom, , is, (a) 12 km/h, , 6) 24 km/h, , (c) 36 km/h, , (d) 48 km/h, , body, 57. Ifa, , half of, , journey, , m/s and second, , half with, , covers, , with speedv,, speed v, m/s,, , for the, , S, , whole, , first, , then the, , average speed, , journey is, , 60. Which of the following is true in the, , following graph?, , V2, , (6) v+2, , ts), , 1, , (a) Velocity is uniform, , 2,2, 300 m, 58. A bridge of length, train in 40, a 100 m long, , is, s., , by, The speed, , (c) 5 m/s, 59. Which, , acceleration, , c), , direction, , of motion does, , d), , displacement, , 61. Angular velocity, , (b) 10 m/s, , graphs, , not, , =, , slope of graph, , of second's, , hand in a, , clock is, , (d) 6 m/s, , of the following, , is uniform, , change, , crossed, , of train is, , (a) 7.5 m/s, , (b), , (a) n rad/s, is not, , (6) rad/s, , possible?, , (a), , C)10rad/s, , d)30, rad/s, Seience 259

Page 6 :
62. Linear speed of, tip of second's hand, length r is, , hei, g, ht, Which, of, about, the, , h and is, , caught back., , a)units, , following, body?, , is true, , (b)units, , (a), , time of ascend, , (6), , velocity of throw, , () 307, (d), , 30, , units, , (C) distance, , units, , (a) h/2, , 68. A, , (6) tfrom ground, , on a sac, , velocity reduces to hal, , on, , of, , sand. Its, , penetrating, , upto 15 cm into it. How much, addition, thickness of sac will t penetrate, , before, , coming to rest?, , c) 15 cm, , acceleration?, , 64. A particle starts from rest has an, , (a), , acceleration of 1 m/s* for 5 s. It then, travels with constant speed for 15 s. It, then retards at 2m/s till it comes to, rest. Its total distance travelled is, , (a) 12.5 m, (b) 6.25 m, (c) 75 m, (d) 93.75 m, 65. The condition under which average, velocity of a body is sun of initial and, , b), , final velocities divided by 2 will be, zero, , (c), , (b) acceleration is uniform, (c) acceleration is non-uniform, rest, , 66. How is distance (x) travelled by a, body related to time () for uniformly, accelerated motion?, (a) x t, , (6) x « V, , (c) xx, , (d) x xP, ., , =, , (6) 10 cm, (d) 20 cm, , 69. Which of the following graphs, shows, motion of a particle with, , (c)fromtop, (d)fromtop, , (d) body is at, , time of, descend, velocity of catch, , 2hand displacement,t=0, , bullet is fired, , (a) 5 cm, , acceleration is, , =, , motion of the, , (d) all of these, , 63. A stone is, dropped from top of a tower, of height h and reaches the, ground in, time t. Its position at time t/2 is (given, a, =10 m/s*), , (a), , body is thrown up, it rises, to, , 67. A, , mnatonnu Daend and Qhin otiase T., , (d), , increased

Page 7 :
dometer of, , dometer,, an, , an automobile, , respectively, , speed,, , and, , 74. The quantities measured by slopes ot, , distance-time graph and velocity, , measure., , graph are, respectively, (a) distance, speed, , d, istance, distance, , average, ( a ), , a v, , a), Ainstantaneous, speed, displacement, speed,, , time, , (b) speed, velocity, , displacement, , (c), , average, , instantaneous speed, distance, , speed, acceleration, , c)av, , ( a ), , An, , (d) distance, timne, , i n s t a n, , has, , inclined plane, , wn, , its, , m/s., , 0 . 8m / s ., , box, , 5, , (a) 5, , an, , distance, , travelled by the, , which, with constant velocity. The graph, c, a, r is, the, best depicts the motion of, , is, , (a), , the s t a r t, , after, , s, , object sliding, , acceleration of, , length at, , The, , an, , 75. Acar retards uniformly and then moves, , (b) 10 m, m, , (d) 20 m, (c), , 15 m, , (a), , and, , (c) negative, 73,, , a, , (b), , uniform, , (b) positive, (d), , small, , (for, , t, , height,, heights) is, , from, falling down, , is, A body, 72., acceleration, its, , increasing, , and, , decreasing, , (c), , zero, , is, Which of the following, , an, , example, , of retarded m o t i o n ?, , in the air, , (a), , a, , football kicked, , (b), , a, , in, pendulum oscillating, , (c), , a, , rolling, , (d), , a, , kite, , (d), , vacuumn, , ball in grass field, , flying in, , the, , sky, , Assertion-Reasoning Type MCQs, Direction (Q76, , to, , lorward. Read the, , Both, , Q84):, , Reason have been put, the Assertion and, In the following Questions,, alternative from the following:, , statements, , the, carefully and choose, , Reason, the Assertion and the, , a r e correct, , of the Assertion., , 0, , The, , Assertion and the Reason, , a r e correct, , correct, , and the Reason is the, , correct, , explanation, , not the correct explanation, but the Reason is, , of the Assertion., , C) Assertion is true but the Reason is false., , d), T h e statement, , of the Assertion, , Reason is true., is false but the, , Science, , 261

Page 8 :
76. Assertion: Displacement is the shortest, distance from one point to another., , used when the accelerati, , 77. Assertion: Uniform circular motion is, , Reason: Acceleration of a body, towards the centre of circular pathacts, , Reason: The earth revolves around the, , Assertion:, , 83., , zero at an, , Assertion: The slope of distance time, , motion hold true for, , accelerated motion only., , uniformly, , Reason: The equations of motion do, not apply to freely falling body as its, , Even when the, , instant,, , a, , non-zero acceleration., , graph gives acceleration of the body., Reason: Greater the slope of distance, time graph, more is the speed of the, Assertion: Newton's equations of, , 30, , down., , 78. Assertion: Sun appears to rise in the, east and set in the west., , 80., , 2, , Assertion: The negative acceleration, a body indicates that body is slowingof, , 82., , every point. So velocity is not constant., , body., , =, , The, , inclination., , also called accelerated motion., , 79., , a, , slope of a, 60° inclination is greatergraph, than with, , Reason:, , greater than distance travelled., , sun in uniform circular motion., , is, , where t is in seconds., , Reason: Displacement can never be, , Reason: Direction of motion changes at, , uations of motion, motion can be, , Assertion:, , 81., , velocitv i, body can ave, , Reason: When the direction of motion, , reverses, then, , veloCity, , momentarily zero., 84., , becomes, , Assertion: In uniform circular motion,, acceleration of the body is zero., , Reason:, , Only direction, , of motion, changes in uniform circular motion,, not the speed of the body., , motion is not uniformly accelerated., , Case Based MCQs, Read the given passages and answer the, , questions that follow based on the passages, and related studied concepts., 1. The following table shows the, , speedometer readings of a car:, , Time, , 262, , Speedometer, readings (km/h), , 10: 25 p.m., , 62, , 10:35p.m., , 74, , 1 0 : 45 p.m., , 90, , 10:55p.m., 11:05p.m., , 60, 65, , 11:15 p.m., , 38, , 7agether, , with, , ), , What is the acceleration of the car, from 10:55 pm to 11:05 p.m. if its, acceleration is uniform?, (a) 0 km/h, (b) 10 km/h, (c) 20 km/h, (d) 30 km/h, , i) Convert the speed of the carat, 10:45 p.m. into SI unit of speed., (a) 10 m/s, (6) 15 m/s, , (c) 25 m/s, (d) 30 m/s, ii) In which time interval does the, speed of car change by maximum, value?, (a) 11:05 pm - 11:15 pm, 6) 10:55 pm - 11:05 pm, , Competency Based and Objective Type Questions-9

Page 9 :
):45 pm, , (e), , acccleration from A to Band from, , :55 pm, 10:55, , -, , pm, , 10:45, , What is the difference between, , (iv), , 10:4, , pm, , 10:35, , displacement of the car, (d), o, off the journ, journey., ne, , C to D?, , displaceme, , Fine, , the, , m, , Fmd, , ), , i, , n, , u, , t, , e, , 10, , s, , (b) 8.6 km, , last, , in, (a) 16.2 km, , (d) 4.5 km, ( c ) 7.9 k m, , which, , time, , interval, , is the, , car, , in, , (v), , (a) 2.5 m/s2, , (b) 5 m/s, , (c) 7.5 m/s, , (d) zero, , The displacement of the body, from t = 8 s to t =, , 14 s is, , ( ) I n, which, r e t a r d e d, , (a), , m o t i o n ?, , 10:45, , (a), (b), , (c), (d), , -, , Both, , ofa, graph, , the, , pm, , 10:25 pm, , (a), , 0:55 pm, , -, , 11:055, , O b s e r v e, , 2, , pm, , 11:15, , pm, , (6), , that, , (c) 80 mn, , (d) 90 mn, , be accelerated, , velocity-time, , t h e following, in m o t i o n, body, , (b) 70 m, , 3. Non-uniform motion of, , 10:35 pm, , and, , (a) 60 mn, , and, , answer, , follow., , body, , can, , retarded. When the, , body changes by equal, in equal, magnitude in s a m e direction, , velocity, , of, , a, , time, its, , intervals of, , questions, , or, , a, , be, , uniformly, , motion is said to, , accelerated., , Similarly,, , velocity of a body changes by, time intervals, unequal amount in equal, , when the, 30, , its motion is said to be non-uniformly, , 20, , accelerated., , 15, , Velocity, , (i), , (m/ls), , 10-, , ), , (ü), , 68, , 10 12 14 16 18, Time (s), , part, , of, , Which, , graph, , uniform motions, , of, , a, , (a) Uniform acceleration, , t, , (6) Zero acceleration, , (c) Uniform retardation, , represents, , body?, , (a) AB, , (b) BC, , (c) CD, , (d) AC, , of the, Calculate the acceleration, from C to D., , body, , (a) 3 m/s, , (6) 3.75 m/s*, , (c) 4.5 m/s, , (d) 5.25 m/s, , (i) What is the displacement of the, , in first 8 seconds of the, motion?, (b) 40 m, (a) 20 m, , line, body moves along a straight, path. It travels with, , A, , (d), , (il), , any of these, , Which of the, , example of uniformly, , an, , accelerated, , motion?, , (a) freely falling body, (b) a body thrown up, (c) a c a r accelerating, , from rest, , at 0.5 m/s2, , body, , (c) 80 m, , following is, , (d), , all of these, , (d) 160 m, , Science, , 263

Page 10 :
() What type of motion is, observed on congested ocity tonpads, ly, , (ii) Which of the following graphs, , enerally, , shows uniformly accelerated, motion?, , in everyday life?, , (a) uniformly accelerated motion, (6) non-uniformly accelerated, , (a), , motion, , (c) uniformly retarded, motion, , t, , (d) uniform circular motion, Observe the followIng graph and, answer, , 4., , the questions., , (6) v, , Y, , 25, 20, , t, , B, , 15 -, , (m/s) 10, , 0, , t, , Time(s), ) Which part of the graph, represents, uniform motion?, (a) AB, (b) CD, (c) BC, (d) both (i) and (i), , (d) v, O, , (iv), , A, , body, , of 6, , m/s., , m, , falls down from a height, towards earth with a 9.8, , Its, , =, , acceleration when it is, , half way down is, , (a) zero, (6) 4.9 m/s, , (c) 9.8 m/ss, , (d) 19.6 m/s, , 264, , (ü') Distance travelled, (6) 15 m, (c) 45 m, , in first 4s is, , (b) 30 m, (d) 60 m, , (ii') Which, , of the following, graph, parts show uniformly accelerated, motion?, , (a), 6), (c), (d), , gether wth Competency Based and Objective Type Questions-, , AB, CD, BC, both (a) and (b)

Page 11 :
What, , is the, , distance travelle, , (n) during retarded motion?, , iv) Which, covers, distancebody, in, , (b) 40 m, (c) 50 m, (d) 60 m, he maximum speed, acquired by, , (a) 30 m, , ()Th, , the body auring its motion is, , (a) 25 m/s, (c) 10 m/s, , the, , questions, , based, , on, , and C, , nistance (in cm) covered by different, bodies, , Body 4Body B Body CC, 20, , 20, , 20, , 20, , 36, , 60, , r ds e c o n d, , 20, , 24, , 100, , 4th second, , 20, , 30, , 140, , Sth second, , 20, , 8, , 180, , 1 s ts e c o n d, , 2ndsecond, , ()Which of the bodies is moving, , (a) A, , (b) B, , (C)C, , (d) noneofthese, , What, , 6., , type of motion is shown by, , (b) B, Two carsP and d) both (a) and (b), Q, are, straight line path on a travelling along a, A to, city B. Car Q highway from city, c)C, , rate of 60, km/h, , travels at a constant, , for 6 hours and, reaches, B.Car P travels at 80, km/h for 2, , hours,, restaurant for 15 minutes,, then travels at 60, km/h for next three, , stops, , at, , a, , hours., i) Total distance travelled by car Q is, (c) 10 km, (6) 360 km, , )30 xkm, 18, , (a) 64.4 km/h, 6) 60 km/h, , (c) 80.8 km/h, , (a) uniform motion, , d) 45 km/h, , c)uniformly accelerated motion, , 4), , (iü) Which of the following, , (a), , (U) Which body, , (6) Car Preaches, , (6) B, , c) C, , (d), , All of these, , destination, , the destination, , first., , distance in 3rd second?, , (a) A, , Car Q reaches the, , is true?, , first., , uniform circular motion, covers maximum, , km, , i) Average speed of car P is, , body B?, , (6) non-uniform motion, , All of these, , displacement iso, , (4) 360 x, , with constant speed?, , (), , (d), , body, (a)A, , in cm) travelled by the bodies A, B, , Time, , (b) B, , )The maximum, , (b) 15 m/s, (d) 20 m/s, , the, tablegiven below which shows distance, , 5 . A n s w e r, , second'?minimum, , 3rd, , a) A, c) C, , (c), , Both cars reach, , the destination, , together., Science 265

Page 12 :
(d), , Car P does not reach its, , (i), , In, , which of the, , followicqung, toiss, displacement of body, , destination, , distance travelled?, , (iv) Motion of car P is, , (a), , (a) uniform, , A, , body moving, , along, , circular path, , (b) uniformly accelerated, , (b), , C) non-uniform, , A, , body moving on :, , road, , (d) retarded, (v) If car P had to reach the destination,, how much total time would it take, , if it travelled the last 20 km at, 40 km/h?, , (b) 5 h 20 min, (c) 5 h 25 min, (d) 5 h 30 min, 7. Distance travelled is defined, , straight, , (c), , boy going from, e to, to, school and back. home, , (d), , A car, , (it) The, , A, , on a, , odometer,, , zig zag path., used in, , measures, , (a) 5 h, , a, , vehicles, , (a) distance travelled, , the, total length of path covered by an, , (b) displacement, (c) speed, (d) velocity, , as, , object in given time. The shortest, distance between initial and final, , (iv) Which of the following quantities, are vector quantities?, , position of the object in given time is, known as displacement of the body., The displacement of the body can be, positive, negative or zero. It cannot, , (a) distance, displacement, speed,, velocity, acceleration., (6) displacement, speed, velocity,, , be greater than distance travelled. In, , (c) displacement, velocity, work,, , acceleration, , Some cases, it can be equal to distance., , acceleration, , Displacement is a vector quantity while, distance is a scalar quantity., , ) A body moves in a circular path, of radiusr. Its displacement and, , distance, after, , round are,, , (d) displacement, velocity, force,, acceleration, (v) When the motion of a body is, , uniformly accelerated, then, (a) distance = displacement, , respectively,, , (6) speed = velocity, , (a) zero, 21u, , (c) direction of motion changes,, , (b) tr,, , but velocity is constant, , (c)rV2,, , TU, , (d) direction of motion and speed, , 3, , (d) zero, Ttr, 2, , 266 eethen uutt, , Comuetencv Based and Ohiective Tune nuestinne-, , changes.

Page 13 :
19. (a), , 20. (b), 25. (d), , 24. (d), , 29. (b), , 30. (c), 35. (c), , 34. (a), 39. (c), 44. (a), 47., , 21. (c), 26. (d), 31. (6), , 36. (b), 41. (a), 46. (b), , 40. (a), 45. (b), , (c) Average speed, , =, , u, , 51., , s, , (a), , =, , 0,, , =, , =, , v, , area, , x, , =, , under, , AB, , x, , 600), 600)+(5X, 2x 600, , total time, , 6 m/s, t, v, , =, , 10, , s, a, , - t graph, , BC+, , =, , CD, , 392 agether with Competency Based and, , (v u)/t, , =, , -, , ar, , x, , (AABC), , ED, , (c), (c), (d), (b), , 23. (c), 28. (b), 33. (b), , 38. (a), 43. (c), , 42. (d), , total distance(10x, , 48. (d), 49. (d), 50. (b), , 22., 27., 32., 37., , =, , 0.6, , =, , + ar, x, , 4, , =, , 7.5 m/s, , m/s, (ACDE), , x4+-2) (6-, , Objective Type Questions-9, , =, , 27, , km/h

Page 14 :
5 .(d)u=(0,a, (, , ., , A, +0.2 x 240, A8, m/a, Nards thc centre of circular, path, , (), , 4.5 km, I =, , (), , MAN)x MAM)292, , m, , m, , min, , OU X 600s2, , Acceleration of car, 6., , 54., , Skm, , Acceleratonof perM, , a), , ., , 0.2 m/s', t ma min - 24), , 7, , h/s, , 60, , Speed == 4.8 4.8x=, 36 km/h, 60, 8, , 57. (d) Average speed = Total distance/Total time, , 1f total distance is 24, then time t, =, , Speed 24, (6) Speed of train, , 58., , 2, , 2, , Length of train + Length of bridge, , =, , Time, , (100+300), , s0(b) A body cannot have two values of distance at same time., , 40s, , m, , 10 ms, , 0. c) The velocity 1s always positive. So direction remains the same,, 61., , rad, (d) Angular velocity, O =- Zn60s, , 62., , (a) Linear speed, , rads, units, , ro = r x, , =, , 63. () u =0,a = 10m/s*; H = ut + a, 64., , (d), , =0;a,, , u, , =, , I, , m/s',t, Ss>V, =, , H=0+x, =, , from top., , ta= Sm/s, , ut, , ut+44f=125m, S2V/2=5, , a,, , =, , 15, , x, , -2m/s', u,, , =, , 75 m, v îm/s, v, =0, =, , =, , or, , =, , v u + 2as,s, 20, s, t S, tS, Total distance, =, , 65., , (b), (a), , =, , 6.25, , m, , 12.5 + 75 +6.25, , =, , 93.75 m, , Uniform acceleration., , 67.(4), , 66. (c), 68., , s, , v,, , =, , u/2, s, , When v,, , =, , =, , 15, , cm, , 0, then S =, , Additional distance, , =, , v= " + 2as or a 4x30 40, u 20 cm, 2a, , 20- 15, , =, , 5, , cm, , Answers 393

Page 15 :
69. (d), 70. (d), 71., , (6), , 72., 73., , (a) Uniform acceleration., (c), , 14. (c), , u, , =0,a 0.8 m/s,1 5 s 8 = M + a, =, , =, , The ball stops, , on, , its, , own, , after, , 0 +, , =, , x, , 08 x 25, , =, , 10 m, , some time., , 75. (c), , Assertion-Reasoning Type MCQs, () The Assertion and the Reason are correct but the Reason Is not the correct, , explanation of the Assertion., 77., , (a) Both the Assertion and the Reason, explanation of the Assertion., , 78., , (6) The Assertion and the Reason, , are, , are, , correct and the Reason, , is, , the correct, , correct but the Reason is not the correet, , explanation of the Assertion., 79. (d) The statement of the Assertion is false but the Reason is true., , 80. (c) Assertion is true but the Reason is false., 81. (d) The statement of the Assertion is false but the Reason is true., 82. (6) The Assertion and the Reason are correct but the Reason is not the, correct, , explanation of the Assertion., , 83., , (a), , Both the Assertion and the Reason, , are, , explanation of the Assertion., , correct and the Reason is the correct, , 84. (d) The statement of the Assertion is false but the Reason is true., , Case Based MCQs, 1., , () (d), , cceleration=, , Av, , Change in velocity, Time, , 65- 60 = 5 km/h,, , .a, , -, , t= 10 min =, , km/h, , (1/6)h 30 km/h, , (i) (c) SI unit of speed = m/s., At 10:45 p.m. speed 90 km/h, , 90X1000 m =, 25 m/s, 3600 s, , A, , (i) (a), (iv) (6), , t, , =, , 10 min =h;, , u, , =, , 65, , km/h,, , V 38 km/h,, , a=, , t, , 38-65= -162 km/h2: s = V-u-58)-(65), 1/6, , () d) Both (a) and (b), 394, , ogether with ompetency Based and Objective Type Questions-9, , = 8.58 km

Page 16 :
., , ) (6) Part BC, ), , (6), , a, , (ii) (c), , slope of CD, , 30-15), (18-14), , s, , area under v, , 3.75 miss, t, , -, , graph, , (AG+BF) GF= 6+ 158 =80 m, , Slope AB= -5), , (v) (a), , (8-0) 1.25 m/s, , Slope CD =3.75 m/s, Difference =3.75 1.25, , 2.50 m/s, , -, , )(d), , S= area, , of BCHF, , BC x BF 6 X 15, 90 m, acceleration or any type of, motion., falling body accelerates at 9.8 m/s' near earth surface., =, , ( ) (d) any, () (d), , =, , of the, , freely, , up has negative acceleration., , Body thrown, , (ii) (a), (iv) (c) Acceleration remains constant., , (v) (6), 4., , (i) (c) For uniform motion, v4 graph is parallel to r-axis., (ii), , (b), , Distance = a(AABH) = x, , 15 x 4 30 m, , (iüi) (d) both (a) and (b), , (iv) (c) Distance, , (v) (a), , 5., , ar(ADEF), , =, , 25 m/s according, , to, , =DF FE =x, x, , the, , x, , 4 =50m, , graph., , distance is, , covers equal, () (a) The body, (ii) (b), (ii) (c) Distance 100m, , 25, , equal time intervals., , (iv) (a), () (c), 6., , () (6), (i) (a), , Distance, , Total, , (80 km/h, , x, , 60 x6 360 km, km/h, 2h) + 0 + (60, , 2h + 0.25 h, , x, , 3h, , Speed, , =, , distance, , Total time, , =, , =, , Average speed, , =, , x, , Time, , Total, , =, , =, , =, , 5.25 h, , distance/Total, , time, , =, , (), , (c), , For last 20 km,, , time, , =, , total time, 10 min. So,, , 3), , 340/5.25, , (i) (d), , (iv) (c), , x, , =, , =, , =, , 340 km, 64.4 km/h, , 5h 25 min, Answers 395