Give an example of motion where there is a change only in speed but no change in direction of motion.

An example for a motion where the speed and direction of motion both changes continuously is

Is the direction of motion constant ?

Give an example to each situation in daily life. i) Speed changes when direction remains constant. ii) Direction of motion changes when speed remains constant. iii) Speed and direction simultaneously change.

(A): Magnitude of average velocity is equal to average speed, if velocity is constant. (R) : If velocity is constant, then there in no change in the direction of motion. Projectile motion .

Give an example of one dimensional motion where a particle moving along the postitive x-direction comes to rest periodically and moves forward.

(A): Acceleration of a moving particle can change its direction without any change in direction of velocity. (R) : If the direction of change in velocity vector changes, the direction of accele ration vector also changes.