A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because
A)no forces act on it.
B)no horizontal forces act on it.
C)of no initial vertical component of velocity.
D)all of the above
E)none of the above

Question

Quizplus · Accepted Answer

In the absence of air resistance, there are no horizontal forces acting on the projectile, so its horizontal component of velocity remains constant. Choice A is incorrect because although no forces act on the projectile in the horizontal direction, gravity does act on it in the vertical direction. Choice C is also incorrect; the initial vertical component of velocity does not affect the horizontal component of velocity.

A Projectile Is Fired Horizontally