Question

describe the motion of a body moving along a frictionless inclined plane. how it compared with the motion of a freely falling body?

Answer 1

There are no frictionless planes anywhere to be found; there, by definition, cannot be. However, if there were, one can be all but certain that objects on them would behave exactly as Galileo predicts. [ However illusory, their value in the design of engines, motors, roadways, even the design of tow truck beds to name a few examples, is noteworthy. Actual results from objects moving down inclined planes can be predicted very accurately by calculating the effect of friction upon the result predicted by Galileo. This is done with the simple formula F(fr)=µ(k/s)*F(n), where the force of friction is equal to the static[disambiguation needed] or kinetic friction coefficient times the vertical normal force of the object against the plane.[6] Unless in a vacuum, a (usually) small amount of potential energy is also lost to air drag