Question

a body is revolving round in a circular path with constant angular speed.then

Answer 1

If the direction of velocity is reversed, the centripetal force does not change in magnitude and direction

D

Its velocity changes due to change of direction

Acceleration

a

, velocity

v

and radius

r

are related as

a

=

r

v

2

. that means acceleration has the same path as that of the radius vector not axis of revolution.

If only the direction of velocity is reversed, the centripetal force will remain in the same direction i.e. towards the centre and the magnitude will also remain the same. so 'B' is true but 'C' is false.

As the body is in a circular path. Velocity being a vector, also changes due to the change in the direction. so 'D' is also true.