A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.0º below the horizontal.
a. What is the work done on the cart by friction?
b. What is the work done on the cart by the gravitational force?
c. What is the work done on the cart by the shopper?
d. Find the force the shopper exerts, using energy considerations.
e.What is the total work done on the cart?
Concept - use the definition of work done to find the work done by friction, gravitational force and the shopper. Since speed is constant, as per work energy theorem net work done will be zero because change in kinetic energy will be zero
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A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a...
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