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Standard XII

Physics

Maximum Push Using Friction

The coefficie...

Question

The coefficient of static and kinetic friction between a body of mass $m = 1$ unit and the surface are $.75$ and $.50$ respectively. A force is applied to the body to maintain constant acceleration when the body is in motion. This constant force is:

g / 4

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g / 2

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3 g / 4

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g

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Solution

The correct option is B $g / 2$
Minimum force with which body will just move = $μ_{s} m g$
After the body start moving frictional force becomes = $μ_{k} m g$
So $F = μ_{k} m g$
or $F = g / 2$

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The coefficient of static and kinetic friction between a body of mass m=1 unit and the surface are .75 and .50 respectively. A force is applied to the body to maintain constant acceleration when the body is in motion. This constant force is:

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The correct option is B $g / 2$
Minimum force with which body will just move = $μ_{s} m g$
After the body start moving frictional force becomes = $μ_{k} m g$
So $F = μ_{k} m g$
or $F = g / 2$