A man applies a force of 150 N to pull a 20kg box with a rope that makes an angle of 60 degrees with the horizontal. The box experiences a kinetic friction of 15 N. calculate the acceleration.

Answer 1

net force=ma
net force also equals 150*cos60-weightcomponet-15
where the weight component along the plane=mg*sin60
the result of all this is
150*cos60-mg*sin60-15=ma
solve for acceleation a.