A flywheel making 120 r.p.m is acted upon by a retarding torque producing angular retardation of πrad/s2. Time taken by it to come to rest is:
1 s
2 s
4 s
3 s
A
1 s
B
2 s
C
4 s
D
3 s
Open in App
Solution
Verified by Toppr
T=Iα ω=120×2π60 ω=4π ω=ω0+αt 0=4π−πt t=4s
Was this answer helpful?
23
Similar Questions
Q1
A flywheel making 120 r.p.m is acted upon by a retarding torque producing angular retardation of πrad/s2. Time taken by it to come to rest is:
View Solution
Q2
A wheel is rotating at 900r.p.m, about its axis. When power is cut off it comes to rest in 1minute. The angular retardation in rad/s2 is:
View Solution
Q3
A fly wheel is revolving at the rate of 300rpm on applying a retarding torque, it slows down at the rate of 4rad/s2, the time in which it comes to rest is
View Solution
Q4
A train is moving with a velocity of 90 kmh−1.It is brought to stop by applying the brakes which produce a retardation of 0.5 ms−2.Find:(i) the velocity after 10 s, and (ii) the time taken by the train to come to rest.
View Solution
Q5
A thin uniform solid wheel is initially rotating with an angular velocity 50rad/s. The mass of the wheel is given to be 4kg and the radius of the wheel is 1m. If the wheel comes to rest in 10s, find the magnitude of the average retarding torque acting on the wheel (in N-m)
(Assume uniform angular retardation)