Question

- State an example to justify the given statements.
(a) An object can have zero velocity and non-zero acceleration at the same time.
(b) The acceleration-time graph of a body is parallel to time axis, indicates non uniform motion.

Answer 1

1.In projectile motion at the peak the velocity of particle is zero but it still have non -zero acceleration.
2.In this type of graph parallel line indicates that the object is travelling with constant acceleration, but its displacement with time is increasing so it shows a non uniform motion.