Question

A pendulum bob of mass m swings in a horizontal plane when the string makes an angle θ with vertical. What minimum additional KE should we impart to the bob so that the string becomes horizontal by giving tangential impulse?

Answer 1

Answer:

Tension not only provides the centripetal force necessary for circular motion but also balances the component of weight along the string.

component of weight along the string is mgcosθ.

Thus, T−mgcosθ=

L

mv

2

⇒T=mgcosθ+

L

mv

2

.

Answer 2

Answer:

ur question is not clear

Explanation:

what is this means