ch02 - MULTIPLE CHOICE. Choose the one alternative that...

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to 1) _______ A) c o n t i n u e to foll ow a cir cul ar pat h. f o ll ow a straight-line path. A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrate s that 2) _______ A) t h e m i l k car ton has ine rtia . t h e r e is an action-reaction pair of forces. gravity tends to hold the milk carton secure. D) the milk carton has no acceleration. E) none of these 3) An object maintains its state of motion because it has 3) _______ A) m a ss. s peed. weight. D) acceleration. E) all of these 4) According to Newton's law of inertia, the result of walking much of the day is similar to tightening the head of a hammer when its handle hits a solid surface (Figure 2.2 in the text) so that we are actually a little bit shorter in the 4) _______ A) e v eni ng. m orning. no difference, really 5) A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is 5) _______ A) z e ro. m o re than 30 m/s. less than 30 m/s but larger than zero. D) about 30 m/s. E) more information needed for an estimate 6) An empty roller coaster car at an amusement park takes 3 min to make its ride from start to finish. Neglecting friction, a fully loaded car would take 6) _______ A) 3 mi n. m o re than 3 min. less than 3 min. 7) A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is 7) _______ A) t h e m a s s o f the pu ck mu ltip lie d by 10 m/ s/s. t h e w ei g ht of the puck divided by the mass of the puck. 0 N. D) equal to the weight of the puck. E) none of these 8) A truck is moving at constant velocity. Inside the storage compartmen t, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor 8) _______ A) e x a c t l y b e l ow the mi dp oin t of the cei lin g. b e h i nd the midpoint of the ceiling. ahead of the midpoint of the ceiling. D) More information is needed to solve this problem. E) none of these 9) If you are...
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ch02 - MULTIPLE CHOICE. Choose the one alternative that...

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