Force of Friction = Mu x Normal Force

The box on the incline is at rest due to friction. Which of these calculations would allow you to get the frictional force?

• mg cos theta

• mg sin theta

• normal force

• mg

Tags

NGSS.MS-PS2-2

• Coefficient of friction

• Mass

• Acceleration

• Velocity

• It doubles

• It halves

• It remains the same

• It quadruples

• It has no unit

• Newton

• Pascal

• Joule

In an experiment, a block is sliding down an inclined plane. Which force is directly proportional to the normal force?

• Frictional force

• Gravitational force

• Tension force

• Centripetal force

A car is moving on a flat road. If the coefficient of friction is 0.3 and the normal force is 1000 N, what is the force of friction?

• 300 N

• 100 N

• 30 N

• 3 N

Tags

NGSS.MS-PS2-2

Which of the following statements is true about static friction?

• It is usually greater than kinetic friction

• It is usually less than kinetic friction

• It is equal to kinetic friction

• It does not depend on the normal force

What happens to the force of friction if the surface area of contact is increased, keeping all other factors constant?

• It remains the same

• It increases

• It decreases

• It becomes zero

In the context of friction, what does the term 'normal force' refer to?

• The perpendicular force exerted by a surface

• The parallel force exerted by a surface

• The gravitational force

• The force of tension

Which type of friction acts on a stationary object?

• Static friction

• Kinetic friction

• Rolling friction

• Fluid friction