Which example is correctly matched with its type of friction?
1 A plane flying through the air is an example of static friction.
2 Pushing a car that isn't moving is an example of sliding friction
3 A sled sliding down a grassy hill is an example of fluid friction.
4 A skateboard's wheels moving on cement is an example of rolling friction.
(i need a lil help here) (my little said she needed help, im using my account on her computer)