The time of flight for a projectile motion is given by the expression
Answer Details
The time of flight is the total time taken by a projectile to complete its motion before it returns to the same level from which it was projected. The given expression for time of flight involves the initial velocity of the projectile (U), the angle of projection (theta) and the acceleration due to gravity (g).
Therefore, the expression for the time of flight of a projectile is:
\(\frac{2U sin \theta}{g}\)
Option (C) matches the given expression and is the correct answer.