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A person pushes a 19.7-kg shopping cart at a constant velocity for a distance of 21.3 m on a flat horizontal surface. She pushes in a direction 27.3 ° below the horizontal. A 46.2-N frictional force opposes the motion of the cart.
(a) What is the magnitude of the force that the shopper exerts?
Determine the work done by
(b) the pushing force,
(c) the frictional force, and (d) the gravitational force.
Two 330 kg (733 lb) masses are separated by a distance of 4 m. Using Newton's law of gravitation, find the magnitude of the gravitational force exerted by one mass on the other
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