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: ->->->->->->->->->->->-> :
This question is similar to the last seed questions. My first instinct was to go with my same responses, but after rethinking and checking, I am going to change my initial answer. I think that the vehicle would be going to same speed when it coast back down the incline as it would be going while it coasts up the incline. This is because of conservation of momentum.
Close. Conservation of energy would give you this result, provided nonconservative forces are absent.
However on real pavement there is significant rolling friction, which is nonconservative.
#$&*
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15-20 minutes
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&#Please compare your solutions with the expanded discussion at the link
Solution
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