Questions
A wheel rotates at 50 rpm about its axis. The angular retardation that can stop the wheel in one
minute ·is
a
π36rads-2
b
π18rads-2
c
π72rads-2
d
π9rads-2
detailed solution
Correct option is A
The initial angular velocity,ω0=50rpm=5π3rads-1using ω∣=ω0+αt∵ α=ω-ω0t=0-5π360rads-2=-π36rads-2Talk to our academic expert!
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A stationary wheel starts rotating about its own axis at uniform angular acceleration 8rad/s2. The time taken by it to complete 77 rotations is
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