Part A Find the work Wi done on the block by the force of magnitude F Express yo

Question

Part A Find the work Wi done on the block by the force of magnitude F Express your answer numerically, in joules. 7 Two forces, of magnitudes F-75.0 N and F, = 50 0 N act in opposite directions on a block, which sits atop a surface, as shown in the figure. (Figure 1) Initially, the center of the block is at position -1.00 cm At some later time, the block has moved to the right, and its center is at a new position, z 6.00 cm Hints 1 of 1 SubmitMy Answers Give Up Part B Find the work W2 done by the force of magnitude F 50.0 N as the b Express your answer numerically, in joules. Hints

Explanation / Answer

F1=75.0 N, F2= -50.0N, xi=-1.00cm, xf=6.00cm

A)

W1=F1*x = F1*(xf-xi) = 75.00*[0.0600-(-0.0100)] = 5.25 J

B)

W2=F2*x = F2*(xf-xi) = -50.00*[0.0600-(-0.0100)] = -3.50 J

C)

Wnet=W1+W2 = 5.25 – 3.50 = 1.75 J

D)

KE=Wnet=1.75 J

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