For example, a car hits a brick wall. But the car was traveling at constant speed. Zero acceleration.
In: Physics
As the car drives, it keeps moving via the engine accelerating it as fast as the friction it is experiencing decelerates it (Well, at least in a hypothetical scenario where that is possible)
If the car hits a brick wall, part of its’ speed, possibly all of it, is transferred onto the brick wall, which is why it deforms. The total force at the moment of impact doesnt change. Part of it is transferred, thus causing the wall to deform and such, but it remains the same all over. The car is slowed in the process
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