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Maximum Push Using Friction

Find the fric...

Question

Find the friction force acting on block of mass $m = 1 k g$ where $μ = 0.8$ .

6.8 N

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7 N

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6 N

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0 N

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Solution

The correct option is D $0 N$
If block is at $r e s t$ then $f r i c t i o n$ will be $z e r o$
And if the block is moving then maximum friction will be $μ m g$
put $g = 9.8$ and $μ = 0.8$ we get maximum value of friction as $7.84 N$ Option D is correct

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