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Given in the figure are two blocks A and...

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 frictional force applied by the wall on block B is

A

100 N

B

80 N

C

120 N

D

150 N

Text Solution

Verified by Experts

The correct Answer is:
C
For vertical equilibrium of the system
`f_( s ) = f_(s )_(A) + f_(s )_(B )`
`=20 + 100`
`=120 N`
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