2.22 m/s. Average speed is Total distance over time it took. 100m/45s = 2.22m/s
Answer:

Explanation:
The momentum of a body is defined as the product of its mass and its velocity at a given time. Therefore the change in the momentum of the ball is given by the difference between the final momentum and the initial momentum:

If the acceleration of a moving object is zero, the object remains at a constant speed (without friction)
Answer:
write something like after the spacecraft launched all of the potential energy transformed into kinetic energy causing the spacecraft to go at an abnormal spped.
Explanation: