Читать книгу Physics I For Dummies - Steven Holzner - Страница 57

In physics terms, acceleration, a, is the amount by which your velocity changes in a given amount of time, or

Given the initial and final velocities, v_i and v_f, and the initial and final times over which your speed changes, t_i and t_f, you can also write the equation like this:

Acceleration, like velocity, is actually a vector and is often written as a, in vector style (see Chapter 4). In other words, acceleration, like velocity but unlike speed, has a direction associated with it.