friction 2

Friction is a ______ type of force

• Contact force

• Non contact force

• Electrostatic force

• Gravitational force

Friction is independent of

• Area of contact

• Nature of the surface

• Normal force

• gravitational force

Frictional force is directly proportional to

• Normal force

• Rough surface area

• Smooth surface area

• Gravitational force

The force which opposes the relative motion of two surfaces of bodies in contact

• force

• Frictional force

• Gravitational force

• normal force

Friction is more in

• Rough surface area

• Smooth surface area

• Oil surface area

• Ball bearings

In which the friction is less

• Rough surface area

• Smooth surface area

Static friction come into play when we try to move an object at rest relative to another surface or object

• True

• False

The direction of friction is

• Along with applied force direction

• Opposite to applied force direction

• Zero

• 1

Unit for force is

• Kg

• M

• Newton

• L

In which of the following friction is less

• smoothly polished marble

• Rubber

• Coin

• All the above