It would get the road oily
Water
It would overheat
It could stall
It could set on fire
It would start a fire
This coating of oil makes them slippery
It would cause accidents
What would happen if all the oil leaked out of a running car engine?
Heat
Can cause a fire
Move faster
Can cause slippery roads
Heat from friction can also cause problem, like a car to overheat
It can cause abrasion
Can cause solar flares
It can cause a car to overheat
What problem can friction cause?
Due to friction
Friction
Friction causes molecules on the surface to move faster and faster molecules have more heat energy
Mass
From chemical reaction
Because of friction making the particles move faster
From electric current
From mechanical reaction
Moving hands
Why do rubbing your hands make them warm?
Slippery
By making them wet
Move faster
By making them cold
By making them more slippery
It coats the surface of the moving parts, making them slippery, which reduces the friction
By making them stop
It makes the car cool
How does oil reduce friction between moving car parts?
Moving
Faster
Slower
Do particles rubbed against a slippery surface move faster or slower?
The car can overheat
It can overheat
The engine freezes
The tires pop
Watery
Overheating of the engine
It can catch on fire
The engine explodes
What can happen in a car when there is too much friction?
A chemical reaction
Friction causes the molecules on rubbing surfaces to move faster
Friction causes molecules to move faster in order to create heat energy
Friction causes the molecules on rubbing surfaces to move faster. Faster moving particles have more heat energy
The exchange of molecules
Friction destroys molecules
The force that holds things to earth
What is friction?
Due to friction
Because of friction
The friction produced by rubbing them together causes molecules to move faster, and faster moving molecules have more heat energy
From chemical reaction
From electric current
Because of friction making the molecules move faster
Because of mass
From mechanical reaction
Moving hands
Why do your hands become warmer when you rub them together?
Slippery
Add oil
Water is added to the engine
Add water
The surfaces of moving parts can be coated in oil
Antifreeze is added to the engine
It is coated with sand
Oil is added to the engine
What can be done to prevent friction problems in engines?
Yes
Sometimes
Can cause overheat
Can oil reduce the amount of heat that is produced from the moving parts of a car?
Frictiion sets them on fire
Move faster
They create electrical shocks
They get moist
Friction that makes them warm
They get abrasions
Warm
What happens when you rub your hands together?
No
Sometimes
If you try to warm your hands by rubbing them together when they are wet, will they warm up as well as rubbing them together when they're dry?
Surface covered in oil or water
Dry surface
Oil friction
Are you likely to experience more friction walking on a surface covered in oil or water than on a dry surface?
You know that friction also causes heat. Think about when you rub your hands together. It is friction that makes them warm. But why does this happen? Friction causes the molecules on rubbing surfaces to move faster. Faster moving particles have more heat energy. Heat from friction can be useful. Can you think of other places where you might find friction? Friction also lets you light a match. Heat from friction can also cause problems. It can cause a car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts. This coating of oil makes them slippery. When things are slippery there is less friction. Have you ever seen a sign that says, slippery when wet? This too has to do with friction. Water, like oil, can reduce friction. The wet surface may allow your shoes to slide more easily. 