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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 3 kg as shown in figure. The coefficient of friction between the surface and the block is `1/4` .Then the friction force acting on the block is

A

15 N downwards

B

20 N downwards

C

25 N upwards

D

30 N upwards

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The correct Answer is:
B
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