Without air resistance, a projectile fired horizontally at 8 km/s from a mountain top will
A) accelerate downward at g as it moves horizontally.
B) trace a curve that matches Earth's curvature.
C) return to its starting position and repeat its falling behavior.
D) all the above
E) none of the above
Question 2
Ignoring air resistance, what maximum speed can be given to a horizontally moving tennis ball as it clears the net 1.25 m high to remain within the edge of the court, which is 12.0 m from the bottom of the net?
A) 12.0 m/s
B) 16.0 m/s
C) 24.0 m/s
D) 48.0 m/s