Applications of Newton's Laws of Motion

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

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

• similar
• opposite

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

• rolling
• static
• sliding
• fluid

Which type of friction occurs when an object rolls over or rotates on a surface?

• sliding
• static
• fluid
• rolling

Which force is pictured?

• compression
• tension
• bending
• torsion

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Wheels on a skateboard most likely experiences-

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

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

Which of the following shows the direction of the friction force?

• A
• B
• C
• D

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

There is more friction between _________ surfaces.

• smooth
• slippery
• hard
• rough