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Chapter 9: Q. 4 (page 227)
The rope in FIGURE Q9.4 pulls the box to the left across a rough surface. Is the
work done by tension positive, negative, or zero? Explain.
Work done is positive .
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In Problems through you are given the equation(s) used to solve a problem. For each of these, you are to
a. Write a realistic problem for which this is the correct equation(s).
b. Draw a pictorial representation.
c. Finish the solution of the problem
Evaluate the dot product if
a). role="math" localid="1647759176820" and
b).and
A kg softball player slides into second base, generating J of thermal energy in her legs and the ground. How fast was she running?
A kg particle moving along the axis experiences the force shown in FIGURE. The particle’s velocity is m/s at m. What is its velocity at m and m?
A 20 g particle is moving to the left at 30 m/s. A force on the particle causes it to move the the right at 30 m/s. How much work is done by the force?
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