Its the same reason you don’t move when you jump while standing on a train or in a bus. when you are standing on a train, your moving the same speed over the earth as the train. If you jump you dont just magically slow down. Same thing goes for the earth spinning/moving

“bad for you” and weight gain are not the same. you can be bone skinny and still have health problems from your diet

your engine is made up from a bunch of pistons in a chamber which go up and down. all the pistons connect to a rod which they spin when they go up and down. gasoline is a liquid that can catch on fire and explode very easily. a spark plug is a device at the top of the chamber which creates sparks.

when a piston goes down, gasoline and air are sucked in to the chamber. then when it goes back up the spark plug makes a little spark that makes the gasoline explode. this explosion pushes the piston back down and makes the rod spin. the rod that they spin is connected to the wheels which makes the car move. these explosions happen thousands of times per minute and keep the engine spinning

in your hard drive, data is just stored as a bunch of 1s, and 0’s. deleting it doesnt get rid of those 1s and 0s right away but it tells your computer it doesnt need those anymore and can change it if you want to download something else and it needs that space