A person pushes a 10.5-kg shopping cart at a constant velocityfor a distance of 37.6 m on a flat horizontal surface. She pushesin a direction 20.2 ° below the horizontal. A 53.1-N frictionalforce opposes the motion of the cart. (a) What is the magnitude ofthe force that the shopper exerts? Determine the work done by (b)the pushing force, (c) the frictional force, and (d) thegravitational force.
