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Newton's Second Law: Rotatory Version

The work done...

Question

The work done in carrying the body from $A$ to $B$ is $20 J$ and from $B$ to $C$ is $15 J$ . The work done in moving the body from $A$ to $C$ assuming the force involved in all the cases is conservative force is:

35 J

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25 J

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5 J

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\sqrt{175} J

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Solution

The correct option is A $35 J$
$w h e n a b o d y i s p r e s e n t i n a s p a c e w h e r e o n l y c o n s e r v a t i v e f o r c e s p r e s e n t t h e n w o r k i s e x c l u s i v e l y a s t a t e f u n c t i o n . W_{A C} = W_{A B} + W_{B C} W_{A C} = 20 + 15 = 35 j o u l e s$

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