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An eraser weighing 2N is pressed against...

An eraser weighing 2N is pressed against the black board with a force of 5N. The coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards

A

2N

B

2.8N

C

4N

D

4.8N

Text Solution

Verified by Experts

The correct Answer is:
C
`F^(1)=f_(s)+mg, f_(s)=mu_(s)mg`
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