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# Block constrained to move inside a ring

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A block of mass m slides on a frictionless table. It is constrained to move inside a ring of radius l which is fixed to the table. at t=0, the block is moving along the inside of the table (i.e., in the tangential direction) with velocity (v)O (v initial) , the coefficient of friction between the block and the ring is "u"

1) find the velocity of the block at later times

2)find the position of the block at later times

https://brainmass.com/physics/velocity/block-constrained-move-inside-ring-25223

#### Solution Preview

The normal force exerted by the ring must yield the centripetal acceleration. This means that the normal force, fn, is:

fn = m ...

#### Solution Summary

It is explained how to reduce this problem to straightforward algebra.

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