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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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A pendulum is made by tying aball to a string. The pendulum is pulled to one side, then released. What is the ball’s speed at the lowest point of its trajectory?
a. In , what minimum speed does a particle need at point A to reach point B?
b. What minimum speed does a particle need at point B to reach point A?
A cable with of tension pulls straight up on a block that is initially at rest. What is the block’s speed after being lifted ? Solve this problem using work and 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?
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?
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