Question

The acceleration of a certain body is 15 m / s2,

this means that :?
1) travels a distance of 15 m in 1 s.
2) it has a constant speed of 15 m / s.
3) for every second of movement it travels 15 m away.
4) its speed changes by 15 m / s for each second of movement.
5) travels a distance of 15 m for every second squared of movement.

Answer 1

4) Its speed changes by 15 m/s for each second of movement.

Step-by-step explanation:

Acceleration is the change in velocity over time.

So an acceleration of 15 m/s² means the velocity increases 15 m/s per second.