A stationary wheel starts rotating about its axis at uniform angular acceleration 8rad/sec^2. The time taken by it to complete 77 rotations is
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Answer:
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
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