HW 14 - Force & Motion 2

Rubbing your hands together is a simple example of ___.

• Force
• Friction
• Gravity
• Speed

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

___ is created when friction occurs.

• Cold
• Heat
• Gravity
• Friction

Tags

NGSS.MS-PS1-4

Which would require the most force to move?

• a toy car
• a sleeping cat
• a science book
• a chair with a friend sitting in it

Definition of force

• how far something travels

• how fast something moves

• something that causes a change in motion (a push or pull)

• force that works against motion as objects rub together

Definition of friction

• force that pulls objects toward Earth's surface

• how fast something moves

• force directly exerted on an object

• force that works against motion as surfaces rub together

Definition of air resistance

• force that pulls objects toward's Earth's surface

• force in liquid that keeps objects afloat

• frictional force air exerts against a moving surface

• force directly exerted on an object

Definition of gravity

• force that pulls objects toward Earth's surface

• force in liquid that keeps objects afloat

• force directly exerted on an object

• frictional force air exerts against a moving object

How could you make something move faster?

• push with less force

• push with more force

• make a wider shape

• add mass

What would happen to the motion of a car traveling at 60mph if a strong wind wind was blowing on its front?

• It would speed up.

• It would go backward.

• It would slow down.

• It would stay at the same speed.

Students are racing mail carts across the parking lot. Each student pushes with the same force and for the same amount of time. Which cart will go the fastest?

• a full cart pushed by one kid

• a full cart pushed by two kids

• an empty cart pushed by one kid

• an empty cart pushed by two kids