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Chapter 10: Q. 65 (page 259)
Write a realistic problem for which the energy bar chart shown inFIGURE P10.65 correctly shows the energy at the beginning and end of the problem.
Given in the explanation.
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An object moving in the xy-plane is subjected to the force , where x and y are in m.
a. The particle moves from the origin to the point with coordinates by moving first along the x-axis to , then parallel to the y-axis. How much work does the force do?
b. The particle moves from the origin to the point with coordinates by moving first along the y-axis to , then parallel to thex-axis. How much work does the force do?
c. Is this a conservative force?
A particle that can move along the x-axis is part of a system with potential energy
where A and B are positive constants.
a. Where are the particle’s equilibrium positions?
b. For each, is it a point of stable or unstable equilibrium?
Rank in order, from most to least, the elastic potential energy stored in the springs of FIGURE Explain.
A spring is compressed . How far must you compress a spring with twice the spring constant to store the same amount of energy?
The spring in FIGURE CP10.73 has a spring constant of . It is compressed , then launches a block. The horizontal surface is frictionless, but the block’s coefficient of kinetic friction on the incline is . What distance d does the block sail through the air?
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