Two forces, of magnitudes F₁ = 95.0N and F₂ = 35.0N , act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at positionxi = -1.00cm . At some later time, the block has moved to the right, and its center is at a new position, x_f = 3.00cm .

Part A
Find the work W₁ done on the block by the force of magnitude F₁ = 95.0N as the block moves from x_i = -1.00cm to x_f = 3.00cm .

Part B

Find the work W₂ done by the force of magnitude F₂ = 35.0N as the block moves from x_i = -1.00cm to x_f = 3.00cm .

Part C

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

Part D

Determine the change K_f-K_i in the kinetic energy of the block as it moves from x_i = -1.00cm to x_f = 3.00cm.