A 20kg sled initially at rest slides down a hill which is
A 20kg sled, initially at rest, slides down a hill, which is 20m tall. If the total work done by forces of friction and air resistance (non-conservative forces) is -2500J, what is the speed of the sled at the bottom of the hill?
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a 20kg sled initially at rest slides down a hill which is 20m tall if the total work done by forces of friction and air
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