Two blocks are hung by a string draped over a pulley, a 1.5-kg block on the left

Question

Two blocks are hung by a string draped over a pulley, a 1.5-kg block on the left and a 3.2-kg block on the right. The two blocks start out at rest and at the same height.

Problem 7.58 Two blocks are hung by a string over a pulley, a 1.5-kg block on the left and a 3.2-kg block on the right. The two blocks start out at rest and at the same height. what is the change in the gravitational potential energy of the system of blocks and Earth when the 3.2-kg block has dropped 0.56 m Express your answer with the appropriate units AU 9.829 Submit My Answers Give Up incorrect; one attempt remaining; Try Again Part B What is the change in the kinetic energy of the system between release and this instant? Express your answer with the appropriate units AK 9.829 Nm Submit My Answers Give Up

Explanation / Answer

Here ,

m1 = 1.5 Kg

m2 = 3.2 Kg

part A) h = 0.56 m

change in potential energy = (m1 - m2) * g * h

change in potential energy = (1.5 - 3.2) * 9.8 * 0.56

change in potential energy = -9.33 J

part B)

for the change in kinetic energy

change in kinetic energy = - change in potential energy

change in kinetic energy = 9.33 J

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