Find the work W 1 done on the block by the force of magnitude F 1 = 70.0N as the block moves from x i = -3.00cm to x f = 4.00cm.

Find the work W 2 done by the force of magnitude F 2 = 45.0N as the block moves from x i = -3.00cm to x f = 4.00cm.

What is the net work W net done on the block by the two forces?

Determine the change in the kinetic energy of the block as it moves from x i = -3.00cm to x f = 4.00cm