Question

Abody just begins sliding on a horizontal surface when a force of 100 N is
applied parallel to the surface. If the body is pulled with a horizontal force of 50
N, the frictional force will be
​

Answer 1

★ Ánswer

A body is just begins to sliding on a horizontal surface when 100 Newton force is applied parallel to the surface.

Conclusions:

• 100 Newton force is bigger amount of Force applied to the body.
• Moving body has a larger momentum so, Frictional force is much less, which is applied back upon the Body.

Now, If body is pulled with the Force of 50 Newton .

Conclusions:

• Moving Body has half amount of momentum with respect to the above mentioned Situation.
• If any Body is moving with low speed then they have low amount of momentum, so More Frictional force is applied.

Hence, If the Body is pulled with a horizontal force of 50 N, the Frictional force will be double (with respect to earlier situation).

Answer 2

Given :

A body just begins sliding on a horizontal surface when a force ,

$F_{g} = 100N$  is applied parallel to the surface.

To find :

the frictional force( $F_{f}$ ) , if the body is pulled with a horizontal force, $F_{H} = 50N$ ?

Step-by-step explanation:

The frictional force must be in the opposite direction of the horizontal applied force .

$= > F_{g} = F_{f} + F_{H}$

Frictional force $F_{f}$ = $= > F_{g} - F_{H}$

=> $F_{f} = 100N -50N = 50N$

Hence , If the body is pulled with a horizontal force of 50

N, the frictional force will be = 50N

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