A force that opposes motion between any surfaces that are in contact.

• gravity

• acceleration

• friction

• direction

Which type of friction is shown in the picture?

• rolling

• fluid

• static

• sliding

Which type of friction is shown in the picture?

• fluid

• static

• rolling

• sliding

If the following objects were dropped from the same height, which one would hit the floor first?

• 
• 
• 

Tags

NGSS.MS-PS2-2

Which type of friction is shown in the picture?

• rolling

• static

• fluid

• sliding

This photo represents...

• Air resistance

• water resistance

• friction force between 2 solid bodies

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Dolphins have streamline shape to.............

• increase water resistance.

• Decrease water resistance.

• No answer

Tags

NGSS.MS-PS3-1

Which boy A or B will slide down faster

• A

• B

• A and B

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What does the strength of the force depend on? Check the answers that apply.

• The types of surfaces

• The weather

• How hard the surfaces push together

• motion

Tags

NGSS.MS-PS2-2

_____________ friction acts on objects that are not moving.

• sliding

• rolling

• static

• fluid