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A body of mass 1kg is attracted by the earth with a force which is equal to, a. 9.8N, b. 6.67x 1011, c. 1 N, d. 9.8m/s, . What is the gravitational force between two objects?, a. attractive at large distances only, b. attractive at small distances only, c. attractive at all distances, d. attractive at large distances but repulsive at small distances, The value of ‘g’, a. Increases as we go above the earth’s surface, b. Decreases as we go to the centre of the earth, c. Remains constant, d. Is more at equator and less at poles, The ball is thrown up, the value of ‘g’ will be, a. Zero, b. positive, c. negative, d. negligible, The gravitational force causes, a. Tides, b. Motion of moon, c. None of them, d. Both a n b, The mass of the body on moon is 40kg, what is the weight on the earth., a. 240kg, b. 392N, c. 240N, d. 400kg, Newton’s law of gravitation applies to, a. Small bodies only
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b. Plants only, c. All bodies irrespective of their size, d. For solar system, The gravitational force between two objects is F. If masses of both the objects are halved, without altering the distance between them, then the gravitational force would become, a. f/4, b. f/2, c. f, d. 2f, The Earth attracts the moon with a gravitational force of 1020N. The moon attracts the earth, with a gravitational force of, a. Less than 1020N, b. 1020N, c. Greater than 1020N, d. 10-20N, The distance between two bodies becomes 6 times more than the usual distance. The the F, becomes, a. 36 times, b. 6 times, c. 12 times, d. 1/36 times, , Value of g at the surface of the earth is 10 m/s2, then the value of 'g' at a height Re,, from the surface of the earth is: (Re is the radius of the earth), 1. 1 m/s2, 2. 2.5 m/s2, 3. 4.5 m/s2, 4. 10 m/s2, , Escape velocity (ve) of a body depends upon its mass (m) as: (Here M is mass of earth), Ve ∝ M, Ve ∝ 1/m, Ve ∝ √m, Does not depend upon mass of the body
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The force of attraction between two objects of masses ‘M’ and ‘m’ which lie at a distance ‘d’ from, each other is directly proportional to theSum of the masses of objects M + m, Product of the masses of objects M × m, Difference between masses of objects M – m, Sum of the squares of masses of objects M² + m², The height at which the weight of a body becomes (1/16)th of its weight on the surface of the earth, (radius R) is, 4R, 5R, 15 R, 3R, Once a satellite has been launched into orbit, the only force governing its motion is the force of, ______., Gravity, Elasticity, Friction, Fuel driven, Consider a heavenly body which has a mass twice that of the earth and a radius thrice that of the, earth. The weight of a book on this heavenly body, if its weight on the earth is 900 N will be :, 400 N, 600 N, 500 N, 200 N, What would be the acceleration (in m/s²) due to gravity on a planet whose mass is 1/7th the mass of, earth and radius half the radius of earth? (g = 9.8 m/s2), 5.6, 4.9, 4.2, 3.5, The force that binds the atmosphere around the Earth is theNuclear force, Force of gravity.
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Atmospheric pressure., None of the above., What is the force required to produce an acceleration of 9.8 m/s2 on a body of weight 9.8N? Take g, = 9.8 m/s2., 1N, 9.8 N, 4.9 N, 19.6N, Value of g at the surface of the earth is 10 m/s2, then the value of ‘g’ at a height Re, from the surface, of the earth is: (Re is the radius of the earth), 1 m/s2, 2.5 m/s2, 4.5 m/s2, 10 m/s2, , A ball is dropped from a satellite revolving around the earth at a height of 120 km. The ball will, 1.Continue to move with same speed along a straight line tangentially to the satellite at that time, 2. to move with the same speed along the original orbit of satellite, 3.Fall down to earth gradually, 4.Go far away in the space, What is the mass of a girl who weighs 450 N?, 450 kg, 4.5 kg, 459 kg, 45.9 kg, The intensity of the Gravitational field of the Earth is maximum at the_________., Surface of the earth, Poles, Centre of the earth, Equator, What is the height at which acceleration due to gravity becomes 1/4th the acceleration due to gravity, on the surface of the earth in terms of ‘R,’ radius of the earth?, 3R, R/3, 2R, R
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If the density of Earth is doubled keeping its radius constant then acceleration due to gravity will, become (the present value is 9,8 ms-2), (a) 9.8 ms-2, (b) 4.9 ms-2, (c) 19.6 ms-2, (d) 2.45 ms-2, A satellite is orbiting around the Earth with a period T. If the Earth suddenly shrinks to half its radius, without change in mass, the period of revolution of the satellite will be, (a) T, (b) T2, (c) T√2, (d) 2T, Two satellites of mass m, and 10m, are put in the same orbit around the sun. If T1 and T2 be their, time periods, then T1T2 =, (a) 4, (b) 1, (c) 12, (d) 14, A projectle is fired with a velocity less than the escape velocity. What can we say about the sum of, its potential and kinetic energies?, (a) Negative, (b) Positive, (c) Zero, (d) May be +ve, -ve or zero, The acceleration due to gravity’ increases by 0.5% when we go from equator to poles. What will be, the time period of the pendulum at the equator which beats seconds at the poles?, (a) 1.950 s, (b) 1.995 s, (c) 2.050 s, (d) 2.005 s, At what height above the surface of Earth of radius R will the acceleration due to gravity be reduced, by 0.1%?, (a) R100, (b) R200, (c) R1000, (d) R2000, A bail of weight W is thrown vertically upwards. The apparent w eight during the upward motion will, be, (a) zero, (b) more than W, (c) less than W, (d) W, The time period (T) of the artificial setelllite of Earth depends on the density (p) of the Earth as, (a) T ∝ r, (b) T ∝ 1ρ, (c) T ∝ 1√ρ, (d) T ∝ √ρ, How much work per kilogram need to be done to shift a 1kg mass from the surface of Earth of, infinity? Take acceleration due to gravity = g and radius of the Earth = R., (a) gR, (b) Rg
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(c) gR2, (d) gR, What percentage of the potential energy is gained by the body in rising through a height equal to the, radius of the Earth assuming that the gravitational potential energy of a body infinite distance away, from Earth is zero., (a) 1%, (b) 10%, (c) 50%, (d) 20%, A person on the moon can jump higher than on the Earth as, (а) the moon has rough surface., (b) the moon is cooler than Earth., (c) the value of ‘g’ on the moon is smaller than that on the Earth., (d) there is almost no atmosphere on the moon., , The gravitational pull on two bodies is 6.67 × 10-11 Nm²kg-2 in vacuum. The, value of the gravitational pull in a dense matter of density 1016 kg m-3 will be, (a) 6.67 × 10-11 Nm² kg-2, (b) 6.67 × 10-21 Nm² kg-2, (c) 1.3 × 10-10 Nm² kg-2, (d) 6.67 × 10-1 Nm² kg-2, Which of the following is the evidence to show that there must be a force acting on Earth directed, towards the Sun., (a) revolution of Earth around the Sun., (b) apparent motion of Sun around the Earth., (c) duration of falling bodies towards Earth., (d) phenomenon of day and night., In order to find the time, the astronaut orbiting in an Earth satellite should use:, (а) a pendulum clock., (b) a watch having a hair spring to keep it going., (c) either a pendulum clock or a watch., (d) neither a pendulum clock nor a watch., , The orbital speed of Jupiter is, (a) less than the orbital speed of Earth., (b) greater than the orbital speed of Earth., (c) equal to the orbital speed of Earth., (d) zero., Weightlessness experienced while orbiting the earth in spaceship, is the, result of:, (a) zero gravity, (b) centre of gravity, (c) inertia, (d) acceleration, A satellite appears to be at rest when seen from the equator. Its height from the Earth’s surface is, nearly, (a) 6400 km, (b) 32000 km, (c) 35800 km
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(d) 358000 km
