please explain, not getting any of them Comes to Shove Ch 10 Tutorials When Push

Question

please explain, not getting any of them

Comes to Shove Ch 10 Tutorials When Push « previous | 7 of 12 | ne Two forces, of magnitudes F1 90.0 N and F2 25.0 N, act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure Figure 1) Initially, the center of the block is at position i 6.00 cm At some later time, the block has moved to the right, and its center is at a new position, Zr=400 Part A Find the work Wi done on the block by the force of magnitude Fi 90 0 N as the block moves from z 6.00 cm to 400 cm Express your answer numerically, in joules Hints Figure 1 of1 Submit My Answers Give Up Part B + x Find the work W2 done by the force of magnitude F2 25.0 N as the block moves from z- 6.00 cm to rt = 4 00 cin Express your answer numerically, in joules Hints Type here to search 11:40 PM ^ dx 9 11/12/2017

Explanation / Answer

part a)

Force , F1= 90 N

as the object is moving in the direction of F1

work done is positive

W1 = F1 * (x2 - x1)

W1 = 90 * (0.04 - (-0.06))

W1 = 9 J

the work done in moving the block is 9 J

part b)

Now, for F2

as the object is moving in oposite of the direction of F2

work done is negative

W1 = F2 * (x2 - x1)

W1 = 25 * (0.04 - (-0.06))

W1 = 2.5 J

the work done in moving the block is 2.5 J

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