# Neglecting the air resistance, the time of flight of a projectile is determined by

Question : Neglecting the air resistance, the time of flight of a projectile is determined by

(A) 𝑈 𝑣𝑒𝑟𝑡𝑖𝑐𝑎l

(B) 𝑈ℎ𝑜𝑟𝑖𝑧𝑜𝑛𝑡𝑎𝑙

(C) $U=U_{vertical}^{2}+U^{2}horizontal$

(D) $U=U\left( U_{vertical}^{2}+U_{horizontaL}^{2}\right) ^{\dfrac{1}{2}}$