A Projectile Is Launched Vertically Upward at 40 M/s

Multiple Choice

A projectile is launched vertically upward at 40 m/s. If air resistance is negligible, its speed upon returning to its starting point is

A) less than 40 m/s.
B) 40 m/s.
C) more than 40 m/s.
All along the ball's trajectory, its acceleration is
D) g downward.
E) g at an angle.
F) zero.
If air resistance does affect motion, then the ball's speed upon returning to its starting point is
G) less than 50 m/s.
H) 50 m/s.
I) more than 50 m/s.