Friction

On which surface would a toy car travel the furthest when pushed?

• Ice

• Snow

• Carpet

• Sand

Tags

NGSS.MS-PS2-2

When we pour sand on an icy road, what force are we increasing to help cars stay on the road?

• Electricity

• Magnetism

• Friction

• Gravity

Tags

NGSS.MS-PS2-2

How does friction affect speed?

• More friction increases speed

• More friction decreases speed

• Less friction decreases speed

• Friction has no effect on speed

Tags

NGSS.MS-PS2-2

What are 2 factors that determine the amount of friction between 2 objects?

• How smelly or not smelly the objects are

• The amount of friction is the same in all situations

• The color and brightness of the objects

• Force and roughness between surfaces

Rough surfaces have _________ compared to smoother surfaces.

• greater friction

• less friction

• the same amount of friction

• no friction

Why is it harder for the boy in Image B to get down the hill?

• The ice has more friction

• The grass has more friction

• Boy B is taller

• Boy B isn't trying his best.

Tags

NGSS.MS-PS2-2

Which would NOT be a way of reducing friction?

• making the surfaces smoother

• using waxes, oils, or grease

• wearing socks on hardwood floors

• Getting new tires on your car to help your car gain traction

Why is it important for basketball players to wear shoes with tread when playing?

• 
  to increase the speed of the player

• to increase friction between the floor and the player’s feet

• to decrease the amount of force needed for the player to move

• to decrease the force between the player and the floor

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

• opposite

• similar

• upward

• parallel

What is the unit for force?

• Grams

• Liters

• Newtons

• Pounds