2007-01-29 02:51:48 · 6 answers · asked by Tami B 1 in Science & Mathematics ➔ Engineering
Momentum is changed due to the applied impulse - Here it is the force exerted by the brakes. Both the momentum and kinetic energy of the car drop to zero.
I mention kinetic energy, because this is the amount of work that the brakes must do. And here the energy is converted to heat. This is very wasteful, and energy efficient hybrid cars often have a means to store the energy while braking (i.e. with magnets the energy can be used to recharge the battery).
2007-01-29 07:18:13 · answer #1 · answered by Leonardo D 3 · 0⤊ 0⤋
Stopping causes a complete loss of momentum.
2007-01-29 17:26:46 · answer #2 · answered by Jeffrey S 6 · 0⤊ 0⤋
As momentum is defined as mass times velocity, when a car comes to rest its velocity will be zero and therefore its momentum is zero. Its momentum is lost to friction due to braking.
2007-01-29 10:59:31 · answer #3 · answered by The exclamation mark 6 · 1⤊ 0⤋
well Momentum is the amount of mass in movement and if there is no movement, the momentum is probably changed to potential energy or something of that sort.
2007-01-29 10:58:40 · answer #4 · answered by kiwi 2 · 0⤊ 0⤋
The energy goes at the same speed before the car stopped.
2007-01-29 11:05:06 · answer #5 · answered by dUdE 1 · 0⤊ 0⤋
It is converted to heat (via the friction of braking). Touch your rotors if you don’t believe me.
2007-01-29 11:01:46 · answer #6 · answered by Bayou Brigadier 3 · 1⤊ 0⤋