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## Homework Statement

A particle of mass m is whirled on the end of a string of length R. The motion is in vertical plane in Earth's gravitational field . The instantaneous speed is v when the string makes angle Ө with the horizontal. Find the tension T in the string and the tangential acceleration at this instant.

## Homework Equations

## The Attempt at a Solution

This is my classical mechanics homework problem.

T= Fc+W sin theta .

I have come up with this equation , is this correct . And how to find the tangential acceleration?