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OpenStudy (anonymous):
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OpenStudy (loser66):
I got 20 N ,not 200N like you, I don't know why
OpenStudy (anonymous):
i'm getting 40 N West
OpenStudy (loser66):
explain me, please. @Euler271
OpenStudy (anonymous):
F = ma F_A = 80 N F_B = 120 N sum of forces on B = F_B F_B = 80 + F = 120 F = 40 N
OpenStudy (loser66):
oh yea!! you are right, hahah. I don't know why my 20*4 =100 hehehe. my bad
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OpenStudy (anonymous):
lol its cool
OpenStudy (loser66):
hahaha, it's not cool, it's stupid. hehehe
OpenStudy (loser66):
nope, Euler is right, \[F_B = m_b a_b = 120 and it is the total force on B while it is under force A = 80, therefore, the unknown force is 120 - 80 =40, not add
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