Question

Which statement describes the horizontal motion of a horizontally launched projectile?

The projectile’s acceleration is zero, so its velocity is zero.
The projectile’s acceleration is –9.8 m/s2, so its velocity is changing.
The projectile’s acceleration is zero, so its velocity is constant.
The projectile’s acceleration is –9.8 m/s2, so its velocity is constant.

Answer 1

"The projectile’s acceleration is zero, so its velocity is constant."

Explanation: Gravity acts downward (vertical acceleration ≈ −9.8 m/s²) and does not produce horizontal acceleration (neglecting air resistance). With zero horizontal acceleration, the horizontal component of velocity stays constant.