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Phy 121
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A typical automobile coasts up a typically paved incline, stops, and coasts back down to the same position.
• When it reaches this position, is it moving faster, slower or at the same speed as when it began? Explain
answer/question/discussion: ->->->->->->->->->->->-> :
The car is traveling at a faster hill due to the incline as it goes backwards, it is not going against gravity like before.
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10 min
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The reasoning you used on the preceding 'seed' question would have applied here also.
The car's potential energy at the end is the same as when it started, so there is zero change in potential energy.
The car is coasting so it is not propelled by any nongravitational force..
There is significant road friction between the tires of the car and the road, which dissipates energy.
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