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A force of 100 N is applied on a block o...

A force of `100 N` is applied on a block of mass 3kg as shown below. The coefficient of friction between wall and the block is `1//4`. The friction force acting on the block is :

A

15 N downwards

B

25 N upwards

C

20 N downwards

D

20 N upwards

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The correct Answer is:
c
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