Question

A body moves with constant speed 'v' along the
circumference of a circle of radius ' If it
completes half of the revolution in t's, then the
magnitude of the average acceleration is

Answer 1

Explanation:

circumference of circle 2π therefore if it completed 1/2 of it's means π=180°

so hence vot=1/2at²

so vot=1/2•180

=90 average velocity

average acceleration=change in velocity/time

=90/12

=45