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qUESTIONS

1.Rotational Dynamics

A boy on a cycle pedals around a circle of 20 metres radius at a speed of The combined mass of the boy and the cycle is 90 kg. The angle that the cycle makes with the vertical so that it may not fall is (g=9.8 m/sec2)

1.Rotational Dynamics

When the road is dry and coefficient of static friction is μ, the maximum speed of a car in the circular path is 10 ms−1. If the road becomes wet and μ′=μ2, what is the maximum permitted speed for the car?

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