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Predict/Explain Ball 1 is thrown to the ground with an
Chapter 8, Problem 7P(choose chapter or problem)
Problem 7P
Predict/Explain Ball 1 is thrown to the ground with an initial downward speed; ball 2 is dropped to the ground from rest. Assuming the balls have the same mass and are released from the same height, is the change in gravitational potential energy of ball 1 greater than, less than, or equal to the change in gravitational potential energy of ball 2? (b) Choose the best explanation from among the following:
I. Ball 1 has the greater total energy, and therefore more energy can go into gravitational potential energy.
II. The gravitational potential energy depends only on the mass of the ball and the drop height.
III. All of the initial energy of ball 2 is gravitational potential energy.
Questions & Answers
QUESTION:
Problem 7P
Predict/Explain Ball 1 is thrown to the ground with an initial downward speed; ball 2 is dropped to the ground from rest. Assuming the balls have the same mass and are released from the same height, is the change in gravitational potential energy of ball 1 greater than, less than, or equal to the change in gravitational potential energy of ball 2? (b) Choose the best explanation from among the following:
I. Ball 1 has the greater total energy, and therefore more energy can go into gravitational potential energy.
II. The gravitational potential energy depends only on the mass of the ball and the drop height.
III. All of the initial energy of ball 2 is gravitational potential energy.
ANSWER:
Part (a)
Step 1 of 3:
Consider two balls are thrown from the same height above the ground. The ball 1 is thrown with an initial speed and the ball 2 falls freely under the action gravity. We are going to find which of these balls has the highest change in potential energy. Assume that the balls have equal mass.