7.7 | A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N
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7.8 | Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a
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7.3 | Calculate the work done on a 1500-kg elevator car by its cable to lift it 40.0 m at constant
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7.24 | A 60.0-kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m-high rise as shown in
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7.5 | Calculate the work done by an 85.0-kg man who pushes a crate 4.00 m up along a ramp that makes
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7.12 | Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a
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Static Friction and Kinetic Friction Physics Problems With Free Body Diagrams
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7.4 | Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 2.0 gal of gasoline. Only 30% of
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7.10 | How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter
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Shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional
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6.30 | If a car takes a banked curve at less than the ideal speed, friction is needed to keep it
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7.25 | How high a hill can a car coast up (engine disengaged) if work done by friction is negligible
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9.14 | A sandwich board advertising sign is constructed as shown in Figure 9.34. The sign’s mass is
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