Question

7. A wheel is rotating at 900 rpm about its axis.
When the power is cut-off it comes to rest in
1 min. The angular retardation in rad/s2 is
(a)π\2
(b)π\4
(c)π\6
(d)π\8​

Answer 1

Answer:

Angular retardation, α=ω0t=30π60rad s−2=π2rad s−2 α = ω 0 t = 30 π 60 rad s - 2 = π 2 rad s - 2 .