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Five ramps lead from the ground to the second floor of a workshop. all five ramps have the same height; ramps b, c, d, e have the samelength; ramp a is longer than the other four. you need to push acart to the second floor and you may choose any of the fiveramps.
assuming no frictional forces act on the cart, which ramp wouldrequire you to do the least work?
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