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A ball is tossed vertically upward. When it reaches its highest point (before falling back downward),

A) the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is directed downward.
B) the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward.
C) the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is zero.
D) None of the above.

the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward.

Explanation:

When a ball is tossed vertically upwards, it reaches its maximum point. This maximum point is known as the maximum height of the ball. At this maximum height, its velocity is zero, its acceleration is directed downwards and the force of gravity acting in the ball is directed downwards towards the earth.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.