Question

Acceleration can be defined as the rate at which velocity ________

Answer 1

The speed is 20 m/s, and the direction is "downward". Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

Step-by-step explanation:

Answer 2

Acceleration is the rate of the change in velocity.

The answer would be the rate at which velocity changes.