Subject Experts Solutions for Chapter: Measurement, Motion and Force, Exercise 1: Practice Exercise

A particle is moving in a circular path of radius $r$ at a constant speed $v$. Which one of the following graphs correctly represents its acceleration $a$?

A force applied on a body is represented as $\overrightarrow{F}=6\hat{\mathrm{i}}-8\hat{\mathrm{j}}+10\hat{\mathrm{k}} \mathrm{N}$ and accelerates it at $1 \mathrm{m} {\mathrm{s}}^{-2}$. The mass of the body is___

A man is sitting in a train which is moving with a velocity of $60 \mathrm{km} {\mathrm{h}}^{-1}$. His speed with respect to the train is

A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?

$1$. The ball moves with constant velocity.

$2$. The ball moves with constant speed.

$3$. The ball moves with constant acceleration.

$4$. The magnitude of the acceleration of the ball is constant.

Select the correct answer using the codes given.

A racing car accelerates on a straight line from rest to a speed of $50 \mathrm{m} {\mathrm{s}}^{-1}$ in $25 \mathrm{s}$. Assuming uniform acceleration throughout, the distance covered will be,

Two bodies $A$ and $B$ are moving with equal velocities. The mass of $B$ is double that of $A$. In this context, which one of the following statements is correct?

The impulse on a particle due to a force acting on it during a given time interval is equal to the change in its___

The motion of a car along a straight path is shown by the following figure.

The car starts from $O$ and reaches at $A, B$ and $C$ at different instant of time. During its motion from $O$ to $C$ and back to $B$, the distance covered and the magnitude of the displacement are, respectively