https//session masteringphysics.com/myct item View? assignment Problem ID colleg
ID: 1396323 • Letter: H
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https//session masteringphysics.com/myct item View? assignment Problem ID college physics 1 HMCHOZ When Push Comes to Shove 49834838 Signed in s Caden BonerH Resources previous | 6of 11 ne Two forces. of magnitudes Fi 800 N and F 25.0 N, act in opposite direc tions on a block, which sits atop a frictionless surface, as shown in tho figue tue 1) initially the center of the block is t position z,- 600 cm At somo later time, the block has moved to the right, and its center is at a new position, zr = 4.00 cm Part A Find the work Wi done on the block by the force of magnitude Fi- 800 N as the block moves from a -6.00 can to zi-400cm Express your answer numerically, in joules Figre 1 , off Submit Part B Fed the wok w, d ne by the fre e of nurt dep, 25.0 N as the biek mous from·6 00 cm Expross your answer namerically, in joules. C)? IVExplanation / Answer
A) W1 = F1*(xf-xi)*cos(0)
= 80*(0.04 - (-0.06))
= 8 J
B) W2 = F2*(xf-xi)*cos(180)
= 25*(0.04 - (-0.06))*(-1)
= -2.5 J
C) Wnet = W1 + W2
= 8 - 2.5
= 5.5 J
D) kf - ki = Wnet (According to work-energy theorem)
= 5.5 J
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