Friction

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

Oil between machine parts would be an example of which type of friction?

• static
• sliding
• fluid
• rolling

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite

Objects balanced on Timmy's head experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-4

A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate

• surface area
• air resistance
• descent velocity
• gravity 

Tags

NGSS.MS-PS2-2

What force stretches a material apart?

• Compression
• tension
• squeezing
• none of the above

Which type of friction occurs when an object moves through a liquid or gas?

• sliding
• fluid
• static
• rolling

What type of force?

• Magnetic
• Gravitational
• Applied
• Normal

Tags

NGSS.MS-PS2-3

Which type of friction occurs when solid surfaces slide over each other?

• rolling
• static
• sliding
• fluid

What force squeezes material together?

• Friction
• Compression
• gravity
• none of the above