3.2 Pre-Assessment

What is a force?

• any acceleration that causes things to speed up
• Any push or pull that causes an object to speed up, slow down or change direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

list an example of a "push" force

Tags

NGSS.MS-PS2-1

What is an example of a "pull" force

Tags

NGSS.MS-PS2-4

What is friction?

• a force that opposes motion
• heat energy

What is mass?

• the force of gravity
• the amout of matter in an object

Which takes more force to move?

• A dresser on a wheels across a hardwood floor
• Sliding the dresser across the capret

Tags

NGSS.K-PS2-1

NGSS.K-PS2-2

Which takes more force to move?

• a 10 pound box
• a 25 pound box

Tags

NGSS.MS-PS2-2

Which surface has MORE friction?

• a basketball court
• Ice

Why does a hot wheel car not roll forever once it is pushed? Why does it slow to a stop?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is the effect of friction on the motion of objects?

• It speeds them up

• It slows them down

• It changes their direction

• It has no effect

Tags

NGSS.MS-PS2-2