The initial speed of a projectile fired from ground is u. At the highest point during its motion, the speed of projectile is (√3/2)u. The time of flight of the projectile is:
Options

Question

The initial speed of a projectile fired from ground is u. At the highest point during its motion, the speed of projectile is (√3/2)u. The time of flight of the projectile is:

G1 Physics · Accepted Answer

At the highest point, speed = horizontal component u cosθ = (√3/2)u, so θ = 30°. Time of flight T = 2u sin30°/g = u/g.