Sec 2 G1 SCI -Friction

Which force below describes friction?

• 
• 
• 
• 

Which of these is an example of friction being useful?

• Friction helps us grip, like rubber tires on the road.

• Friction makes things less efficient.

• Friction slows things down: it can make motors turn more slowly.

• Friction wears away surfaces like the soles of our shoes.

A class are carrying out an experiment to investigate friction on different surfaces.

Which surface will have the most friction?

• Carpet

• Wood

• Rubber

• Tile

Friction produces ______

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• less friction doesn't affect speed

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

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

When we rub our hands together _________.

• frictional force works between them

• energy is released

• our hands become warm

• all off the above

Which of the following is an example of friction that is harmful?

• Pencil marking on paper
• Engine parts wearing out
• sand placed on ice in the winter
• Using an eraser to erase marks

Without friction, an object in motion would never stop.

• true

• false