Test Details

Motion in a Straight Line

Feb 24, 9:00 PM

30 minutes

Feb 24, 9:30 PM

20.0 marks

MCQ

20 questions

teacher

Class Details

Physics

Applied physics

Engineering physics

Class 11/12

Physics

Applied physics

Engineering physics

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Question Text

Question 1 :
The position $x$ of a particle varies with time $t$ a $at^2-bt^3$ . The acceleration of particle will be zero at time $t$ is equal to

Question 2 :
The position of a particle varies with time according to the equation $x\left( t \right)=3{t}^{3}-4{t}^{2}+2$. The acceleration of the particle at $t=2s$ is:

Question 3 :
The displacement $x$ of a particle moving along a straight line at time $t$ is given by $x={ a }_{ 0 }+{ a }_{ 1 }t+{ a }_{ 2 }{ t }^{ 2 }$. What is the acceleration of the particle ?

Question 4 :
The velocity of a vehicle increases from $5$ m/s to $15$ m/s in $5$ s. What is the magnitude of acceleration?

Question 6 :
A car increases its speed from $20  {km}/{h}$ to $50  {km}/{h}$ in 10 seconds. Its acceleration is

Question 7 :
For a uniformly accelerated motion, the average acceleration is equal to

Question 8 :
A race car accelerates uniformly from 18.5 m $s^{-1}$ to 46.1 m $s^{-1}$ in 2.47 seconds.What is the acceleration of the car?

Question 9 :
If the velocity of a particle is $\left( 10+2{ t }^{ 2 } \right) $, then the average acceleration of the particle in $m/s^2$ between 2s and 5s is :

Question 10 :
Can $\displaystyle \frac{d\left | \vec{v} \right |}{dt}= 0\:while\:\left | \frac{d\vec{v}}{dt} \right |\neq 0$.

Question 11 :
The displacement of a particle is given by $y=a+bt+ct^{2}-dt^{4}$. The initial velocity and acceleration, respectively, are 

Question 12 :
The position $x$ of a particle varies with time (t) as $x=a{ t }^{ 2 }-b{ t }^{ 3 }$. The acceleration of the particle will be equal to zero, at time

Question 14 :
A car starts from rest and accelerates to a speed of 20 m/s in a time of 5 s. Find out the average acceleration of car?

Question 15 :
If an  object coveres distances directly proportional to the square of the time lapsed, then the acceleration is

Question 16 :
The acceleration of a body in motion can be known from slope of

Question 17 :
The displacement $x$ of a particle along a straight line at time $t$ is given by: $x={ a }_{ 0 }+\displaystyle\frac { { a }_{ 1 }t }{ 2 } +\displaystyle\frac { { a }_{ 2 } }{ 3 } { t }^{ 2 }$. The acceleration of the particle is

Question 18 :
Which are, moving from rest, has an average acceleration of $2.0\ ms^{-2}$?

Question 19 :
If a car requires $30$ seconds to accelerate from zero to $90\ km$ per hour, its average acceleration is, most nearly.

Question 20 :
A ball is dropped from an elevator moving upward with acceleration $'a'$ by a boy standing in it. The acceleration of ball with respect to [Take upward direction positive]

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