Читать книгу Physics I For Dummies - Steven Holzner - Страница 65

Acceleration can be uniform or nonuniform. Nonuniform acceleration requires a change in acceleration. For example, when you’re driving, you encounter stop signs or stop lights often, and when you slow to a stop and then speed up again, you take part in nonuniform acceleration.

Other accelerations are very uniform (in other words, unchanging), such as the acceleration due to gravity near the surface of the Earth. This acceleration is 9.8 meters per second² downward, toward the center of the Earth, and it doesn’t change (if it did, plenty of people would be pretty startled).