In the Figure,a Force F Is Being Applied to the Block

question 28

Multiple Choice

In the figure,a force F is being applied to the block with a magnitude such that it moves up along the frictionless inclined place with a constant velocity of 5 m/s.The angle in the figure is 30 ^$\circ$ ,and the mass of the block is 50 kg.How much work (in Joules) is done by the force F in moving the block 10 meters along the surface of the inclined plane (within 5% accuracy) ?

• A)500 J
• B)2500 J
• C)4200 J
• D)5000 J
• E)zero

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