Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Question
Chapter 8, Problem 4Q
To determine
Whether the kinetic energy is conserved in the three cases of the experiment.
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Since the initial potential energy and final kinetic energy are zero, our equation now becomes
EP,f = EK,i.
We can then substitute the formula for kinetic energy,
EK = 1/2mv2,
and the formula for gravitational potential energy,
EP = mgh,
mghf = 1/2mvi2.
Now it's just a matter of doing the algebra, solving for the final height
hf,
and substituting values to find
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Notice that the mass m divides out of both sides of the equation, so the value of the mass is not needed to find the final height.
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Chapter 8 Solutions
Physics Laboratory Experiments
Ch. 8 - Prob. 1ASACh. 8 - What is the condition for the conservation of...Ch. 8 - Show that Newtons second law can be written in the...Ch. 8 - Is the conservation of linear momentum consistent...Ch. 8 - In a system of particles for which the total...Ch. 8 - Suppose that a particle of mass m1 approaches a...Ch. 8 - Do the results of the experiment support the...Ch. 8 - Prob. 2QCh. 8 - In Cases 1 and 2, one of the cars was initially at...Ch. 8 - Prob. 4Q
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