Neglecting air resistance,the time of flight of a projectile is determined by:
- A$U_{\text{vertical}}$
- B$U_{\text{horizontal}}$
- C$U = U_{\text{vertical}}^2 + U_{\text{horizontal}}^2$
- D$U = U(U_{\text{vertical}}^2 + U_{\text{horizontal}}^2)^{1/2}$
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