Given in figure are two blocks A and B of weight 20N and 100N, respectively. These are being

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Given in figure are two blocks A and B of weight 20N and 100N, respectively. These are being pressed against a wall by a force F as shown. If the coefficient of friction between the blocks is 0.1 and between block B and the wall is 0.15, the frictional force applied by the wall on block B is:
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Apparently the question is missing a line in many books modules etc which is "Block remain stationary as shown" The given question is incomplete

yaboinonu
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friction force cannot be greater than fmax = uN which comes out to be 30N (0.15*200).

rituvishwakarma
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Main formula of wall-mass experiment that is Weight/coff. of friction is not used why?

hjkkoolhgd
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Why did you take no slip condition by urself.It is not given

samsirsphysicsclasses
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Bhai tum padhana chod doo. Badi meherbaani hogi 🙏

gw-zahid