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Social ScienceA shopper pushes a grocery cart 22.0 m at constant speed on level ground, against a 31.0 N frictional force. He pushes in a direction 26.00 below the horizontal.(a) What is the work (in J) done on the cart by friction?J(b) What is the work (in J) done on the cart by the gravitational force?J(c) What is the work (in J) done on the cart by the shopper?JFind the force the shopper exerts (in N), using energy considerations. (Enter the magnitude.)(d)NWhat is the total work (in J) done on the cart?(e)J
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A shopper pushes a grocery cart 22.0 m at constant speed on level ground, against a 31.0 N frictional force. He pushes in a direction 26.00 below the horizontal. (a) What is the work (in J) done on the cart by friction? J (b) What is the work (in J) done on the cart by the gravitational force? J (c) What is the work (in J) done on the cart by the shopper? J Find the force the shopper exerts (in N), using energy considerations. (Enter the magnitude.) (d) N What is the total work (in J) done on the cart? (e) J
Expert Answer
a)
the work done by the fricional force is
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W = fd
substitute the given information in the above equation to calculate W
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(31.0 N) (22.0m) W 682J
b)the work done on the cart by the gravitational force is zero since the direcion of the displacemnt...
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