Why do projectiles have no horizontal acceleration (assuming no air resistance)

A: There is no forces acting on them horizontally

Correct answer: A. Projectiles always have gravity acting on them in the vertical direction, but NO acceleration acting on them horizontally. This means the horizontal speed of the projectile never changes through the duration of the motion. This is because there are no horizontal forces acting on it once it leaves the ground. The only thing propelling it forward is its momentum.

B: They do have horizontal acceleration, but we can’t tell

C: The vertical acceleration cancels out the horizontal acceleration

Why do projectiles have no horizontal acceleration (assuming no air resistance)

Why do projectiles have no horizontal acceleration (assuming no air resistance)

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