Question

The force of friction is maximum when the surface:

1-Is on the point of motion

2-Is at rest

3-Is moving

4-The friction remains same at all points

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Answer 1

Answer:

Here is your answer.....

1. It is on the point of motion.

Answer 2

option 2) The force of friction is maximum when the surface is at rest.

• Friction is a force that acts in the opposite direction to the direction of motion when the object is moving.
• The maximum friction also known as limiting friction between the two surfaces is given by, fmax =  μNmax.
• When the body and the surface are at rest then the grip between them is maximum and so the friction is maximum.
• The limiting friction is always greater than the kinetic friction.
• The friction is maximum between the two surfaces when i) adhesion is more ii) more roughness iii) more deformation of surfaces.

Hence, The force of friction is maximum when the surface is at rest.

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