A water balloon slingshot launches its projectiles essentially from ground level at a speed of 27.5 m/s. (You can ignore air resistance.)

A) A range:

R = v² sin 2 α / g

The maximum range is when sin 2 α = 1, or when: 2 α = 90°

α = 45°

B) R = 27.5² · 1 / 9.81 = 77 m

C) Time:

T = 2 v sin α / g = 2 · 27.5 · sin 45° / 9.81 =

= 2 · 27.5 · 0.7 / 9.81 = 3.92 s