You throw a ball from the ground UP to someone leaning out a second story window. (a) During the motion of the ball, does gravity do positive, negative, or zero work on the ball? Explain your answer. (b) During this same motion of the ball (up from the ground to the window above), how does the kinetic energy of the ball change (increase, decrease, or stay the same)? (c) What is the connection between this change in KE and the work done by gravity?
You throw a ball from the ground UP to someone leaning out a second story window. (a) During the motion of the ball, does gravity do positive, negative, or zero work on the ball? Explain your answer. (b) During this same motion of the ball (up from the ground to the window above), how does the kinetic energy of the ball change (increase, decrease, or stay the same)? (c) What is the connection between this change in KE and the work done by gravity?
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Conservation Of Energy
Section: Chapter Questions
Problem 20P: As shown in Figure P7.20, a green bead of mass 25 g slides along a straight wire. The length of the...
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