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A block of mass m is dragged with same c...

A block of mass m is dragged with same constant speed on two rough surface having same coefficient of fricition in vertical plane as shown in the figure. If the work done aganst friction on semicircular path in two situtation are `W_(1)` and `W_(2)` respectively then.

A

`W_(1)=W_(2)`

B

`W_(1)ltW_(2)`

C

`W_(1)gtW_(2)`

D

data insufficient

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