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Given in figure are two blocks A and B o...

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:

A

(a) 1200N

B

(b) 150N

C

(c) 100N

D

(d) 80N

Text Solution

Verified by Experts

The correct Answer is:
A

Assuming both the blocks are stationary
`N=F`
`f_1=20N`
`f_2=100+20=120N`

Considering the two blocks as one system and due to equilibrium `f=120N`
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Knowledge Check

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