Surfaces and friction

The rougher the surface, the faster an object will travel over the surface.

• True
• False

The amount of friction depends on the weight of the objects pressing together.

• True
• False

Tags

NGSS.MS-PS2-2

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

• similar
• opposite
• parallel
• west

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.4-PS3-2

What is the unit on the force due to friction?

• Centimetres

• Newtons

• Meters

• Kilograms

The force that two surfaces exert on each other as they rub against each other.

• gravity
• friction
• mass
• weight

Why does ice have less friction?

• Because it is frozen water.

• Because it is a smooth surface.

• Because it is cold.

• Because it is slippy.

Tags

NGSS.MS-PS1-4

Will a toy car slow down quicker on carpet or foil?

• Carpet because it is a rough surface and has more friction.

• Carpet because it is a rough surface and has less friction.

• Foil because it is a smooth surface and has more friction.

• Foil because it is a smooth surface and has less friction.

What force makes it harder for the girl to move the sofa?

• Gravity

• Friction

• Push

• Pull

Rougher surfaces have ...

• greater friction

• less friction

• the same level of friction