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Blocks shown in figure moves with consta...

Blocks shown in figure moves with constant velocity 20 m/s towards right. All surfaces in contact are rough. The friction force applied by B on A is

A

`1.75`

B

`1.875`

C

`2.5`

D

`1.25`

Text Solution

Verified by Experts

The correct Answer is:
C
`v = u + at rArr 5 = 15 - (4) t rArr t = 2.5 sec`
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