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Determine the work done by the frictiona...

Determine the work done by the frictional force in moving a block of mass m from point 1 to point 2 over the two paths as shown in figure. The coefficient of friction has the constant value `mu` over the surface. The diagram lies in a horizontal plane.

A

`mu mg L,mu mg L`

B

`mu mg 2L, mu mg L sqrt(2)`

C

`mu mg 2L,mu mg 2L`

D

`mu mg Lsqrt(2), mu mg Lsqrt(2)`

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