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A block A with mass 100kg is resting on ...

A block `A` with mass 100kg is resting on another block `B` of mass 200kg. As shown in figure a horizontal rope tied to a wall hold it. The coefficient of friction between `A` and `B` is `0.2` while coefficient of friction between `B` and the ground is `0.3` . the minimum required force `F` to start moving `B` will be.

A

900N

B

100N

C

1100N

D

1200N

Text Solution

Verified by Experts

The correct Answer is:
C

`F=f_(AB)+f_(BG)`
`=mu_(AB)m_ag+mu_(BG)(m_A+m_B)g`
`=0.2xx100xx10+0.3(300)xx10`
`=200+900=1100N`
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