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bobbob

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a) Let E=PE + KE of the block. What is the change in the mechanical energy E of the block? What is the change in the potential energy of the block?

b) Verify that deltaE = Wnoncons, the change in the mechanical energy of the block is equal to the work done by the non-conservative forces acting on the block.

c) what is the Wgrav, the work done by gravity on the block? Check that Wgrav = -delta PE.

d) Combining your results find the total work done on the block, Wtot = Wcons + Wnoncons.

Verify that Wtot = delta KE

any help would be much appreciated..not sure how to do this part. thanks