No. Friction is useful every time there is a change to how the car is moving. Getting it moving, getting it to turn as well as getting it to slow down.
Yes.
could someone please answer this
all you have to do is sometimes get usful
Smelting
If you didn't have one, how would you work on anything mechanical.
They're useful because I'm awesome
The rosetta stone is used to read hierogyphics.
They are great for war and usful for research anf tourism.
Some species eat aphids and are considered very usefull.
because ruben morales talked about it
They are not but are something that a lot of pupils are familiar with. They are a usful tool for visualising fractions.