Question: 4. (20 points) A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P=5.8 N)

4. (20 points) A block is pushed across a rough horizontal surface

4. (20 points) A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P=5.8 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and 5.6 J, respectively, how much work is done on the block by the force P between A and B? P A B

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