Friction

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

What direction does friction act relative to motion?

• in the same direction
• in the opposite direction 
• need more information
• depends on the force

Tags

NGSS.3-PS2-1

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• less friction doesn't affect speed

Tags

NGSS.MS-PS2-2

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

The amount of friction depends on the weight of the objects pressing together.

• True
• False

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Tags

NGSS.3-PS2-1

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

• True
• False

Tags

NGSS.4-PS3-1

When most objects with smooth surfaces rub, there is less friction.

• True
• False

Which of the following answers is the most scientific answer for the question:

What is friction?

• The random force between two solids, liquids, or gases.

• The contact force between two solids, liquids, or gases that slide past one another.

• The thing that creates static electricity

• A force that is random