Given in the figure are two blocks A and B of weight 20 N and 100 N, 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 friction force applied by the wall on block B is :

Engineering

Physics

Contact Force

Newtons First Law of Motion

Static and Kinetic Friction

Question

Given in the figure are two blocks A and B of weight 20 N and 100 N, 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 friction force applied by the wall on block B is :

80 N

150 N

120 N

100 N

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F = mg

frictional force = 120 N