How does the magnitude of the horizontal velocity change as the human cannonball passes through points a

The question has the following answer options:

A. It decreases.

B. It increases.

C. It decreases then increases.

D. It does not change.

The correct answer is: D. It does not change.

Explanation:

The trajectory of a projectile is the path that a body follows when it has been thrown. It can be depicted in a coordinate system. Typically, the horizontal x axis stands for the distance that the object travels (in direction x) and the vertical and axis stands for the height (in direction y) of the throw. This very common form of movement is surprisingly simple to analyze if the following two assumptions are made:

1. The acceleration of free fall, g, is constant throughout the range of motion and is directed downward.

2. The effect of air resistance can be ignored.

With these assumptions, it is found that the curve that describes a projectile, and that it is known as its trajectory, is always a parable.

The horizontal velocity remains constant because in that direction the acceleration is zero.

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