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A roller coaster car of mass 400kg starts from rest at point A and passes the point B with a speed of 3m/s.if the distance from A to B along the tracks is 20m,how large is the average friction force retarding the motion of the car
10 years ago

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bobpursley
if it is a horizontal track

vf^2=vi^2+2ad remembering a=Forcefriction/mass
10 years ago

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