Forces - Step 4

The rougher the surface, the slower an object will travel over the surface.

• True

• False

Some examples of fluid friction are...

• dancing

• 
• 

If you try to roll a car in these surfaces,

which one will generate more sliding friction?

• 
• 
• 
• 

Select the options where static friction is preventing the object from moving

• 
• 
• 
• 

Which surface will create more rolling friction?

• 
• 
• 
• 

What is friction?

• A type of magnetism

• 
  A force that pulls objects towards each other

• 
  A type of electricity

• A force that resists motion

If we smooth a surface......

• The force of friction decreases

• 
  The force of friction remains the same

• The force of friction increases

• Friction is no longer present

Friction is...

• A non-contact force.

• A contact force.

What happens to friction when we increase the weight of an object in contact with a surface or another object?

• 
  The force of friction decreases.

• The force of friction remains the same.

• The force of friction increases.

• Friction is no longer present.

How does friction affect speed?

• Less friction decreases speed.

• More friction decreases speed.

• More friction increases speed.

• Less friction doesn't affect speed.