What stops a car from moving forward or backward

Examples:

-- up and down, but not sideways or forward and backward

-- forward and backward, but not sideways or up and down

-- left and right, but not forward and backward or up and down

A backward pass is one that does not go forward. Often, the receiver of a backward pass may then pass the ball forward. Once the ball has been passed forward, it may not be passed forward again during the same play.

2 steps backward

Both "forward and backward" and "forwards and backwards" are grammatically correct. "Forward and backward" is more commonly used in American English, while "forwards and backwards" is more commonly used in British English.