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Two bodies A and B of masses 10kg and 5k...

Two bodies `A` and `B` of masses `10kg` and `5kg` are placed very slightly separated as shown in figure. The coefficient of friction between the floor and the bloks is `mu=0.4` . Block `A` is pushed by an external force `F`. The value of `F` can be changed. When the welding between block `A` and ground breaks, block `A` will start pressing block `B` and when welding of `B` also breaks, block `B` will start pressing the vertical wall -

What should be the minimum value of `F`, so that block `B` can press the vertical wall

A

`20N`

B

`40N`

C

`60N`

D

`80N`

Text Solution

Verified by Experts

The correct Answer is:
C
`F_(min)=f_(A)+f_(B)=60N`.
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