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1			A force of 30 N is applied for 5 s to each of two bodies of different masses. (a) Which one has the greatest momentum change? (b) The greatest velocity change? (c) The greatest acceleration?
2			Two objects with different masses have the same kinetic energy. Which has the larger magnitude of momentum?
3			What is the momentum of an automobile (weight = 9800 N) when it is moving at 35 m/s to the south?
4			A sports car traveling along a straight line increases its speed from 20.0 mi/h to 60.0 mi/h. (a) What is the ratio of the final to the initial magnitude of its momentum? (b) What is the ratio of the final to the initial kinetic energy?
5			A submarine of mass 2.5 × 106 kg and initially at rest fires a torpedo of mass 250 kg. The torpedo has an initial speed of 100.0 m/s. What is the initial recoil speed of the submarine? Neglect the drag force of the water.
6			The three bodies in Fig. 7.27 each have the same mass. If one of the bodies is moved 12 cm in the positive x-direction, by how much does the center of mass move? <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Fig. 7.27::/sites/dl/free/0070524076/57990/fig_027.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Fig. 7.27 (62.0K)</a>Fig. 7.27
7			Two cars, each of mass 1300 kg, are approaching each other on a head-on collision course. Each speedometer reads 19 m/s. What is the magnitude of the total momentum of the system?
8			Two identical gliders, each with elastic bumpers and mass 0.10 kg, are on a horizontal air track. Friction is negligible. Glider 2 is stationary. Glider 1 moves toward glider 2 from the left with a speed of 0.20 m/s. They collide. After the collision, what are the velocities of glider 1 and glider 2?