An object, previously at rest, slides #7 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #6 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
1 Answer
Feb 27, 2016
0.64
Explanation:
It can be solved by applying conservation of mechanical energy.
The initial PE of the body =
The frictional force exerted by the ramp
Again the frictional force exerted by horizontal floor
By law of conservation of energy
Work done against friction = Initial PE