From number 5 what is the time depenend force acting on the body ? Show all work

5) A body of mass m moves in a horizontal direction such that at time t its position is given by x(t) = a cos(wt + ) where a, w, and pare constants. What is the time dependent force acting on the body? 6) In the following figure, the horizontal surface on which this block slides is frictionless. If the two forces acting on it each have magnitude F = 30.0 N and M = 10.0 kg . what is the magnitude of the resulting