Question

A cyclist is moving on a circular path with constant

speed. What is the change in its velocity after it. has

described an angle of 30°

Answer 1

The change in its velocity after it has  described an angle of 30° will be half of the initial value.

Explanation :

When a body describes an angle then its velocity vector rotates through the same angle.

The change in its velocity is given by,

ΔV = 2VsinФ/2

If the initial velocity is V , the angle = 30° given

hence,

ΔV = 2Vsin30/2

= 2V sin15

= 2V x 0.25

= V/2

Hence the change in its velocity after it has  described an angle of 30° will be half of the initial value.