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A 72-kg sprinter accelerates from rest to a speed of 11.0 m/s in 5.7 s.
(a) Calculate the mechanical work done by the sprinter during this time.
(b) Calculate the average power the sprinter must generate.
(c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories?
A visual inspection of an insect with mass 0.4mg (milligrams) suggest that its uncertainty in postion is 0.5um, How fast could the insect be moving
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the space shuttle orbited the earth in a circular orbit with a radius of 200 miles greater than the earths radius.a
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