I need help with parts A and B, also: Part C: What is the net work Wnet done on

Question

I need help with parts A and B, also:
Part C: What is the net work Wnet done on the block by the two forces (Express your answer numerically, in joules)
Part D: Determine the change Kf-Ki in the kinetic energy of the block as it moves from xi= -6.00 cm to xf= 3.00 cm t: Work, Energy and Power Item 4 Two forces, of magnitudes Fi 100 N and F-200 N act in op Figure cni At some later time the block has moved to the nght, and its corter is at a posion " 3.00 cm Find the workw, done on te block by the force of magvide F1.100Nas the block moves ton z.-400tozf.300 Express your answer numerically, in joules View Available Hints) 1 of 1 Find the won w, dore by the force of magnadeF,20 0 N as te block moves hom Express your answee numerically, in joules. View Available Hints) .400 cm to zt.10an

Explanation / Answer

a) W1 = F1 (xf - xi) = 100 (0.03 m - (-0.06 m) )

W1 = 9 J

b) W2 = F2 (xf - xi) = -20 * (0.03 m - (-0.06 m) )

W2 = - 1.8 J

c) Wnet = W1 + W2 = 9 -1.8

net work Wnet = 7.2 J

d) Kf Ki = Wnet

Kf Ki = 7.2 J

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