1.

A particle is moving in a circle of radius R in such a way that at any instant the normal and tangential components of the acceleration are equal. If its speed at t=0 is u_(0) the time taken to complete the first revolution is :

Answer»

`R//u_(0)`
`u_(0)//R`
`(R)/(u_(0))(1-E^(-2pi))`
`(R)/(u_(0))(e^(-2pi))`

ANSWER :C


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