Friction

Friction is a _______ that occurs between two surfaces.

• opposite

• force

• surface

• movement

Friction acts to _______ motion, so it slows a moving object or stops objects from moving.

• increase

• help

• oppose

• reduce

Which golf ball would have the most friction acting on it?

• A golf ball that was hit into the sand

• A golf ball that was rolled on a tile floor

• A golf ball that was dropped onto the grass

• A golf ball that was rolled across the short grass

The photo shows a soccer ball rolling from right to left across the grass. Which direction is friction acting on the ball?

• on the bottom of the ball

• on top of the ball

• from right to left

• from left to right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which force is shown by the red arrow?

[force, motion, or friction]

Does sandpaper apply more or less friction to an object than ice?

• more

• less

• the same amount

What is one way to help a heavy object move more easily?

• make the object heavier

• make the object lighter

• use wheels

• add rubber feet to the object

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Different _______ produce different amounts of friction.

[objects, surfaces, or materials]

How can you investigate friction?

• Observe stationary objects in the classroom

• Put different objects on one surface to see if the objects move

• Drop different objects from different heights

• Push, pull, or roll different objects across different surfaces

Tags

NGSS.MS-PS2-2

What is man-made sharkskin material being used for?

• the bottom of ships

• airplanes

• swimsuits

• houses

Tags

NGSS.MS-PS1-3