Friction Feb 20th

Forces cause objects to start or stop moving

Why is there smoke?

Friction is a type of force.

Pull

Push

Turn

​Friction

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Friction

трения

Let's watch a video!

Friction produces heat, like when you rub your hands together.

Friction is a force between 2 sliding surfaces (поверхности).

Multiple Choice

Friction is a type of ________.

• force

• position

Multiple Choice

Friction can make things go faster.

• True

• False

Multiple Choice

Friction occurs when two surfaces rub against each other.

• True

• False

Multiple Choice

Who is the Hyde in the show?

• Xavier

• Wednesday

• Tyler

Sometimes we need more friction

like when we need to walk on ice

and sometimes we need less friction

like when we ice skate.

Using Friction

Friction helps us stop cars.

We have better boots thanks to friction.

Friction is sometimes useful

Poll

Which one is your favorite breed?

• Jack Russell

• Shiba Inu

• Corgi

Multiple Choice

Less Friction is always a disadvantage. True or False

• True

• False

Multiple Choice

Sliding on a wet floor.

• High friction

• Low friction

Multiple Choice

Car stopping at a red light.

• High Friction

• Low Friction

Air resistance is a type of FRICTION.

Air resistance сопротивление воздуха

Which ones move faster?

Why are they using this shape?

They make planes more streamlined to overcome air resistance.

Они делают самолеты более обтекаемыми, чтобы преодолевать сопротивление воздуха.

Air resistance makes it more difficult fly in the air.

Multiple Select

Useful examples of friction are _______. Choose 2.

• bicycle brakes

• Ice skates

• threads on winter boots

Multiple Choice

Rougher surfaces have ...

• high friction

• low friction

• the same level of friction

Multiple Choice

Smooth surfaces such as ice, usually produce less friction.

• true

• false

Multiple Choice

How does friction affect speed?

• more friction decreases speed

• more friction increases speed

• less friction decreases speed

Multiple Choice

On which surface will a toy car travel the furthest?

• Carpet

• Polished Wood

• Ice

Multiple Choice

If you kick a ball, what stops the ball?

• the grass

• sand

• your foot

• friction

Multiple Choice

Which is easier to skate on?

• ice

• sand

Multiple Choice

What does friction cause?

• It makes things speed up.

• It makes things slow down or stop.

• It make things fall to the ground.

Multiple Choice

Without friction a toy car would ----

• keep going and going.

• stop right away.

• stay at rest all the time.