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A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 16.0 m. She pushes in a direction 20.0° below the horizontal. A 32.0-N frictional force opposes the motion of the cart.
(a) What is the magnitude of the force that the shopper exerts?
(b) Determine the work done by the pushing force.
(c) Determine the work done by the frictional force.
(d) Determine the work done by the gravitational force.
in the electron gun pictured a potential difference of 12.0 kv is found to bring electrons from rest at the cathode to
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