Question

Because of its energy of motion, when a vehicle’s speed doubles, the vehicle needs about (1 point) Responses twice the distance to stop. twice the distance to stop. half the distance to stop. half the distance to stop. one-fourth the distance to stop. one-fourth the distance to stop. four times the distance to stop.

Answer 1

When a vehicle's speed doubles, the kinetic energy (energy of motion) increases by a factor of four (since kinetic energy is proportional to the square of the speed). Therefore, it requires about four times the distance to stop.

So the correct response is: four times the distance to stop.