You should always be looking behind you when backing up. You don't look forward when reversing because you're not moving in a forward direction.
as a rule the car backing up is more responcible cause they should be being a lot more carefull and watchfull
the car backing up
When there is something behind you that you don't want to hit, or that you don't want to fall over.
taje
it is both of their faults because the person who was backing up should have look more carefully and the the other car should check where they are going
That would be the car backing up because you can't see the other car coming at you and more than likely the other car wouldn't see you either.
If it only happens when backing up, you may have the parking brake engaged.
check behind the car before getting in
Take your time and watch where you are going.
it is the tranny mount
The car in motion is ALWAYS at fault when it hits a stationary vehicle.