Person new to physics here. Consider 2 cars, a and b, which are currently at a resting state. The two cars are identical. Car a starts up first, and accelerates at 2m/s/s until it reaches 100 m/s and then promptly crashes into a wall. Car b then does the same except it only accelerates until 50 m/s and then promptly crashes into a wall. It is intuitive that car a would cause more "damage" to the wall. However, using f=ma, the two car's forces are the same. why is this?