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A wheel is at rest. Its angular velocity...

A wheel is at rest. Its angular velocity increases uniformly and becomes 80 radian per second after 5 second. The total angular displacement is :-

A

80 rad

B

160 rad

C

200 rad

D

120 rad

Text Solution

Verified by Experts

The correct Answer is:
B
`Omega=omega_(0) +alpha t `
` therefore 40 =0 + alpha xx8 therefore alpha = 5 rad //s^(2)`
`and theta = omega_(0) t +(1)/(2) alpha ^(2) =(1)/(2) xx5xx64 = 160 rad `
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