When no air resistance acts on a projectile, its horizontal acceleration is Group of answer choices
at right angles to g.
g.
zero.
upward, g.
the same as the speed it had when thrown upwards.
none of the above
When no air resistance acts on a projectile, its horizontal acceleration is zero.
In the absence of air resistance, the only force acting on the projectile is gravity, which acts vertically downward. This means that there is no horizontal force acting on the projectile, resulting in zero horizontal acceleration. The horizontal component of the projectile's motion remains constant.