Without air resistance,a projectile fired horizontally at 8 km/s from atop a mountain would
A)accelerate downward at g as it moves horizontally.
B)trace a curve that matches the earth's curvature.
C)return later to its starting position and repeat its falling behavior.
D)all of these
E)none of these

Question

Quizplus · Accepted Answer

A projectile fired horizontally at 8 km/s would indeed accelerate downward at g due to gravity, trace a curve matching Earth's curvature, and return to its starting position, repeating its motion, effectively becoming a satellite in orbit.

Without Air Resistance,a Projectile Fired Horizontally at 8 Km/s from Atop