P6 Forces Review Quiz

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

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

When does an elastic material exert elastic force? (choose 2)

• before it is stretched

• as it is stretched

• when it is released

• as it is compressed

When you jump on a trampoline, the surface of the trampoline (choose all that are true)

• changes shape

• exerts elastic force

• pushes you up in the air

• nothing happens

• no elastic force is exerted

Magnets A and B are of equal magnetic strength. In which position will magnets A and B have the least attractive force toward one another.

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Hooke's Law fails when an elastic material reaches its:

• breakdown
• elastic limit
• end of tether
• fracture stress

• A and B only

• A and C only

• B and C only

• C and D only

• B only

• C only

• A and B only

• C and D only

• A and B only

• A and D only

• B and C only

• C and D only

• A and B only

• A and C only

• B and C only

• A, B and C