1.2 Friction is Force

Where is there the least friction?

• On a rough sidewalk

• On ice

• On grass

• On a carpet

What happens when there is a lot of friction?

• You slip and fall

• You stay steady

• You slide easily

When there is little friction, how do surfaces move?

• They stick together

• They slide smoothly

• They bounce

• They stop moving

What can friction reduce?

• Slipping

• Heat

• Sleeping

What is friction?

• A force that makes things move faster

• A force that stops things from moving

• A type of surface

• A kind of material

What does friction do to moving objects?

• Speeds them up

• Slows them down

• Makes them disappear

What happens when you rub your hands together?

• They get colder

• They get warmer

What is an example showing that friction produces heat?

• Jumping

• Rubbing hands

• Sleeping

• Eating

What is not always helpful about friction?

• It makes things cold

• It creates heat

• It makes things shiny

What do engines have that are affected by friction?

• Moving parts

• Lights

• Seats