Friction Quiz 3

What is the force that comes into play when you try to move a stationary sofa?

• Dynamic friction

• Magnetic friction

• Rolling friction

• Static friction

What happens to the force of static friction as you increase the force of push on the sofa?

• It becomes zero

• It decreases

• It remains constant

• It increases

At what point does static friction end and sliding friction begin when trying to move a stationary sofa?

• Tipping point

• Breakaway point

• Fulcrum point

• Pivot point

Why is the sliding friction at a lower level than the maximum static frictional force?

• Because pushing a moving sofa is easier than a stationary one

• Because the sliding friction is always lower than static friction

• Because the floor is smoother when the sofa is in motion

• Because the sliding friction is greater than static friction

In which order do the three kinds of friction occur in terms of increasing force being applied?

• Sliding friction, rolling friction, static friction

• Static friction, sliding friction, rolling friction

• Rolling friction, sliding friction, static friction

• Rolling friction, static friction, sliding friction

What kind of friction comes into play when solid parts are involved?

• Magnetic friction

• Dynamic friction

• Rolling friction

• Static friction

What is the other kind of friction that has not been discussed in the text?

• Rolling friction

• Fluid friction

• Dynamic friction

• Magnetic friction

What is the point around which the sofa just begins to move called?

• Fulcrum point

• Pivot point

• Tipping point

• Breakaway point

What is the force that is balanced by the frictional force applied by the floor when trying to move a stationary sofa?

• Magnetic force

• Dynamic force

• Kinetic force

• Static force

What happens to the sliding friction when the sofa is in motion?

• It becomes zero

• It decreases

• It remains constant

• It increases