Friction

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Tags

NGSS.MS-PS2-2

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

• surface area
• air resistance
• velocity
• gravity 

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

Tags

NGSS.MS-PS2-2

Sally experiences-

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

Wheels of a shopping cart experience-

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

Tags

NGSS.MS-PS2-2

Swimming fish experience-

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

Tags

NGSS.MS-PS2-2

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

• similar
• opposite
• parallel
• west

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

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