A Block Is Pushed Across a Rough Horizontal Surface from Point

question 33

Multiple Choice

A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P = 5.4 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?

• A)2.7 J
• B)1.0 J
• C)2.2 J
• D)1.6 J
• E)3.2 J

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