Question

A particle is rotating in a circular path of radius
0.2 m with angular velocity o = 20 - rad/s,
where t is in seconds. Find its acceleration at
t = 0.5 sec.
(A) 5 m/sec
(B)
141 m/sec
(C) 4 m/sec
(D) 9 m/sec​

Answer 1

Explanation:

The radius of the circular path r=2m

Angular velocity ω=4rad/s

Angular acceleration α is rate of change of angular velocity

α=

t

ω

Here in the question, the angular velocity is given as constant

Therefore, the angular velocity is not changing with time

Thus, angular acceleration α=0