A body of mass 10 $k g$ is slipping on a rough horizontal plane and moves with a deceleration of 4.0 $m / s^{2}$ What is the magnitude of frictional force?

40 N

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20 N

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100 N

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Data insufficient (require coefficient of kinetic friction)

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Solution

The correct option is A
40 N

$f_{r}$ = ma

$f_{r}$ = 10 x 4 kg-m/ $s^{2}$

$f_{r}$ = 40 N

As friction can be the only external force acting of the body in horizontal direction.

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A body of mass 10 kg is slipping on a rough horizontal plane and moves with a deceleration of 4.0 m/ $s^{2}$ . What is the magnitude of frictional force?

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A body of mass 10 kg is slipping on a rough horizontal plane and moves with a deceleration of 4.0 m/s2 What is the magnitude of frictional force?

The correct option is A 40 N fr = ma fr = 10 x 4 kg-m/ s2 fr = 40 N As friction can be the only external force acting of the body in horizontal direction.

A body of mass 10 $k g$ is slipping on a rough horizontal plane and moves with a deceleration of 4.0 $m / s^{2}$ What is the magnitude of frictional force?

The correct option is A
40 N

$f_{r}$ = ma

$f_{r}$ = 10 x 4 kg-m/ $s^{2}$

$f_{r}$ = 40 N

As friction can be the only external force acting of the body in horizontal direction.