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.

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

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.

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.