Solution Found!
A rope tied to a body is pulled, causing the body to
Chapter 3, Problem 3DQ(choose chapter or problem)
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.
Questions & Answers
QUESTION:
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 Step 1: If work is done on a system, the kinetic energy of the system will change. In this case, a rope is tied to a body and it is pulled. So, the body will exert a same force opposite to the direction o