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A ball of mass m is thrown upward with a...

A ball of mass m is thrown upward with a velocity `upsilon`. If air exerts an average resisting force F, the velocity with which the ball returns to the thrower is

A

`vsqrt((mg-R)/(mg+R))`

B

`vsqrt((mg+R)/(mg))`

C

`vsqrt((mg)/(mg+R))`

D

`vsqrt(R/(mg+R))`

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