Question

Suppose a amplitude of simple pendulum having a mass m is theta. Find yhe tension in the string when the bob is at its extreme position

Answer 1

Now, We know that at Extreme Positions the velocity of the body is zero.

Therefore, the Net Force towards the center or commonly the Centripetal Force is zero.

∴ F = mv²/r

F = 0

∵ T =  mg Cos θ + F

∴ T =  mg Cos θ + 0  [Since, Centripetal Force will be zero).

Hope it helps.