Solved: A rope tied to a body is pulled, causing the body

Chapter 6, Problem 3DQ

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QUESTION:

Problem 3DQ

A rope tied to a body is pulled, causing the body to accelerate. But according to Newton’s third law, the body 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 body’s kinetic energy change? Explain.

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QUESTION:

Problem 3DQ

A rope tied to a body is pulled, causing the body to accelerate. But according to Newton’s third law, the body 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 body’s kinetic energy change? Explain.

ANSWER:

Solution 3DQ

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