Frictional Force

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

Anytime two surfaces of objects rub each other, they cause _ _ _ _ _ _ _ _.

Friction can stop object from moving.

• True

• False

Tags

NGSS.MS-PS2-2

Friction always slows down a moving object.

• True

• False

Sports such as football involve kicking, running, stopping and jumping.

How does friction help the players?

(You may pick more than one answers)

• not to slip

• not to walk

• not to jump

• not to fall over

How does friction help people in the cold?

• keep healthy by eating fruits

• keep fit by rubbing hands together

• keep warm by rubbing hands together

Tags

NGSS.MS-PS3-5

Friction produces _____________ to keep ourselves warm or to start a fire.

• heat

• heart

• helium

• hexagon

Tags

NGSS.MS-PS1-4

Rough surfaces have ...

• more friction

• less friction

• the same level of friction

Smooth surfaces have ...

• more friction

• less friction

• the same level of friction

If the surface is smooth, the speed traveled by the toy car will be __________.

• faster

• slower

Tags

NGSS.3-PS2-2

NGSS.4-PS3-1