Question Detail
Question
A projectile is launched horizontally from a height y above the ground with an initial horizontal speed vₓ. The time it takes to hit the ground is
Correct Answer
Option C is the correct answer.
Detailed Explanation
For a horizontally launched projectile, the initial vertical velocity is zero. The time of flight is determined solely by the vertical motion under gravity: y = (1/2)gt². Solving for t gives t = √(2y/g), which depends only on the height y and g, not on the horizontal speed vₓ.
Hint
Which component of motion (horizontal or vertical) determines how long it takes an object to fall from a certain height?