Question

which of the two velocity or accelaration, gives the direction of motion of the body. justify your answerwith an example.

Answer 1

The direction of an object is given by velocity of that object and not by its acceleration. Velocity is rate of change of displacement which shows that how fast object changes its distance and direction. Acceleration is rate of change of velocity which shows how fast an object changes its velocity.

example:- A car is moving with acceleration 'a' in forward direction.when brakes are applied its acceleration becomes '-a' but direction remains same, viz. forward. Hence it is the velocity which gives direction.