A rope tied to an object is pulled, causing the object to accelerate. But according to Newton’s third law, the object pulls back on the rope with a force of equal magnitude and opposite direction. Is the total work done then zero? If so, how can the object’s kinetic energy change? Explain.
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A rope tied to an object is pulled, causing the object to accelerate.
But according to
a force of equal magnitude and opposite direction. Is the total work done
then zero? If so, how can the object’s kinetic energy change? Explain.
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