7.25 | How high a hill can a car coast up (engine disengaged) if work done by friction is negligible
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7.26 | Using values from Table 7.1, how many DNA molecules could be broken by the energy carried by
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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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7.13 | A car’s bumper is designed to withstand a 4.0-km/h (1.1-m/s) collision with an immovable
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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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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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9.17 | To get up on the roof, a person (mass 70.0 kg) places a 6.00-m aluminum ladder (mass 10.0 kg)
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7.61 | A 75.0-kg cross-country skier is climbing a 3.0º slope at a constant speed of 2.00 m/s and
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8.29 | Two piloted satellites approach one another at a relative speed of 0.250 m/s, intending to
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