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Chapter 9: Q. 22 (page 228)
A kg particle moving along the axis experiences the force shown in FIGURE. The particle鈥檚 velocity is m/s at m. What is its velocity at m and m?
Particle's speed at x=2 is 5.10 m/s and at x=4 is 4 m/s
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A ice skater is gliding along the ice, heading due north at . The ice has a small coefficient of static friction, to prevent the skater from slipping sideways, but . Suddenly, a wind from the northeast exerts a force of on the skater.
a. Use work and energy to find the skater鈥檚 speed after gliding in this wind.
b. What is the minimum value of that allows her to continue moving straight north?
A mother has four times the mass of her young son. Both are running with the same kinetic energy. What is the ratio vson /vmother of their speeds?
FIGURE is the force-versus-position graph for a particle moving along the axis. Determine the work done on the particle during each of the three intervals m, m, and m.
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.
A particle moving on the axis experiences a force given by , where is a constant. How much work is done on the particle as it moves from to ?
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