a stationary wheel starts rotating about its own axis at uniform angular acceleration 8rad/sec^2.the time taken by it to complete 77 rotation is
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Answered by
110
θ = (ωi × t) + 0.5αt²
It was initially at rest. Hence ωi = 0
θ = 0.5αt²
t = √(2θ / α)
= √(2 × (77 × 2 π rad) / 8 rad/s²)
= 11 seconds ………[Here I took π = 22/7]
Time taken to complete 77 revolutions is 11 seconds
[Note: We should multiply revolutions by 2 π to convert it to rad]
It was initially at rest. Hence ωi = 0
θ = 0.5αt²
t = √(2θ / α)
= √(2 × (77 × 2 π rad) / 8 rad/s²)
= 11 seconds ………[Here I took π = 22/7]
Time taken to complete 77 revolutions is 11 seconds
[Note: We should multiply revolutions by 2 π to convert it to rad]
Answered by
4
Answer:11 sec
Use theta = wi + 1/2(at^2)
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