An 8kg block starts from rest from the top of a plane, inclined at 40o with respect to the horizontal, and slides down at a

constant acceleration. If the coefficient of kinetic friction between the block the plane is 0.35 determine how far the
block travels in 3s.
2013/

1 answer

constant acceleration....

down the plane: mgsinTheta
friction up the plane: mg*mu*cosTheta

Net force=ma
mg sinTheta-mg*mu*cosTheta=ma
a= g(sinTheta-muCosTheta)

find a, then

distance=1/2 a t^2 solve for distance