3 ptsD,D1Official number: 6879
By approximately how much does the braking distance of a bus increase if the speed doubles?
Explanation
Correct answer: Four times.
According to the laws of physics, the braking distance increases proportionally to the square of the speed, not linearly. This means that doubling the speed results in a fourfold increase in the vehicle's kinetic energy. Consequently, a distance four times longer is required to dissipate this energy and stop the bus.