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Cards In This Set
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A 5-kg fish swimming at a speed of 1 m/s swallows an absent-minded 1 kg fish at rest. The speed of the larger fish after this lunch is
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5/6 m/s
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If you push an object a given distance, while applying twice the force, you do
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Twice as much work
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A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work, but different amounts of
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Power
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If you do work on an object in one third the usual time, your power output is
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THREE TIMES THE USUAL POWER OUTPUT
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The power required to exert 1 N of force, over a distance of 1 m in 1 second is
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1 W
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If an object is raised twice as high, its potential energy will be
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TWICE AS MUCH
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An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is
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TWICE AS MUCH
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A 1000-kg car and a 2000-kg car are hoisted the same distance. Raising the more massive car requires
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TWICE AS MUCH WORK
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Block of ice sliding down an incline has its maximum speed at
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THE BOTTOM
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No work is done by gravity on a bowling ball that rolls along a bowling alley because
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THE FORCE ON THE BALL IS AT A RIGHT ANGLE TO THE BALL'S DIRECTION OF MOTION
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A box is pushed a distance of 2 m with a force of 20 N. How much work is done on the box?
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40 J
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A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground?
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80 J
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A 2-kg mass has 40 J of potential energy with respect to the ground. Approximately how high is it above the ground?
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2 M
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A car moves 4 times as fast as another identical car. Compared to the slower car, the kinetic energy of the faster car is
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16 TIMES LARGER
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Which one car has a greater kinetic energy: a car traveling at 30 km/h or a car of half its mass traveling at 60 km/h?
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THE 60-KM/H CAR
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