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An object of mass m is tied to a string of length l and variable Force F is applied on itwhich bring the string gradually at angle thettawith the vertical. Find the work done by the force F

An object of mass m is tied to a string of length l and variable Force F is applied on itwhich bring the string gradually at angle thettawith the vertical. Find the work done by the force F

Grade:12th pass

1 Answers

Arun
25750 Points
6 years ago
 
Th work done W = ,|`(integration) F.l.dtheta. Here the displacement by the action of force is equal to l d\theta
and you will find the answer as
 
Mgl (1-cos \theta)

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