What unit is used to measure force?

• Pascal

• Newton

• Meter

• Kilogram

What happens when forces are balanced?

• The object slows down.

• The object changes direction.

• The object moves faster.

• There is no change in motion.

Tags

NGSS.3-PS2-1

What is the difference between mass and weight?

• Weight varies with gravity, mass does not.

• There is no difference.

• Mass is a force, while weight is not.

• Mass is measured in newtons, weight in kilograms.

Who is known for discovering gravity?

• Nikola Tesla

• Galileo Galilei

• Isaac Newton

• Albert Einstein

What does Newton's discovery of gravity explain?

• Why objects move

• Why objects fall towards the Earth

• The difference between mass and weight

• How to measure force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What is friction?

• A force that increases motion

• A force that opposes motion

• A force that has no effect on motion

• A force that acts in the direction of motion

Which surface provides the most friction?

• Gravel

• Ice

• Tile

• Paved road

Which box will stop first, the one on ice or the one on a wooden floor?

• Ice

• Wooden floor

• They stop at the same time

• Cannot be determined

Tags

NGSS.MS-PS2-2

What is the role of air resistance in motion?

• It changes the direction of motion.

• It opposes the motion.

• It has no effect.

• It speeds up objects.

Tags

NGSS.MS-PS3-1

What factors affect air resistance?

• Mass of the object

• Size and shape of the object

• Color of the object

• Weight of the object