Answer:
0 m/s
Step-by-step explanation:
The velocity at the top of the highest point that the ball reaches is 0 m/s.
When an object is thrown straight up into the air, it initially has an upward velocity. As the object rises, the force of gravity begins to pull it downward, causing its velocity to decrease. At the highest point of its trajectory, the object has reached its maximum height and is momentarily at rest. This means that its velocity is 0 m/s.
After the object reaches its highest point and begins to fall back down, the force of gravity causes its velocity to increase. As the object falls, its velocity increases until it reaches its initial upward velocity at the point where it was thrown. At this point, the object begins to slow down again as it continues to rise, and the cycle repeats until the object reaches its highest point again.
So, in the case of the ball that is thrown straight up into the air with an initial velocity of 10 m/s, its velocity at the top of the highest point it reaches is 0 m/s.