Question

A wheel initially at rest acquires an angular velocity of 64 rad/s in 4 s. Hence its constant angular acceleration is ........ .
(A) 64 rad/s
(B) 128 rad/s
(C) 16 rad/s
(D) 4 rad/s

Answer 1

The equation is

ω_final = ω_initial + αt

ω_initial = 0

α = ω_final/t = 64/4 = 16 rad/s^2