Question

A cyclist is moving on a circular path with constant speed.what is change in its velocity after it has described an angle of 30°?

Answer 1

Answer:

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.

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Answer 2

Answer:

v/2 is the charge in its velocity after it has described an angle of 30 degrees