Friction and Air Resistance Check

If pushing a sled over grass or ice, which has more friction?

• grass

• ice

True or False: Air resistance is a type of friction.

• True

• False

Friction is __________.

• Only when 2 things rub together.

• An example of gravity.

• When the planets revolve around the sun.

• A force that opposes motion of an object.

Basketball players choose their shoes carefully because the want to ________ friction on the basketball court.

• increase

• decrease

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

If you are moving heavy furniture and want to reduce friction, what could you do?

• Get strong to make it easier to pick up.

• Put a blanket under it and slide it.

• Add water to the floor.

In which situation is it better to have a low friction?

• A football player wearing cleats.

• A student walks down a hallway.

• A ladder leans against a wall.

• A hockey puck slides towards the goal.

A builder uses sandpaper on a piece of wood to make it smooth. Did he increase or decrease the friction?

• Increase

• Decrease

Why does a feather fall through the air more slowly than a bowling ball?

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NGSS.MS-PS2-2

Which combination would reduce friction the most?

• Ice on a paved road.

• Sand on paved road.

• Water on a dirt road.

• Gravel on a dirt road.

Planes are built to have a pointed end in order to fly more easily through the air. What are they trying to combat when flying?

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2