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.HS-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

___________ is the unit of force

• Km

• cm

• m

• N/cm

• N

Tags

NGSS.HS-PS2-1

________________ force acts on an object when it falls.

• Gravity

• Electromagnet

• Upthrust

Tags

NGSS.MS-PS2-4

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area

What is the unit of measurement for pressure?

• pascal
• grams
• milliters
• meters

Pressure decreases when the surface area over which a force is applied increases

• True
• False

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
• The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
• The bottom of the shoe exerts the same pressure as the bottom of the boot.

Anything that has mass and takes up space

• atoms
• elements
• molecules
• matter