An arrow is shot vertically upward at a rate of 240 feet per second from ground level. use the projectile formula to determine when the arrow hit the ground.

After 14.92 seconds, the arrow hits the ground.

Step-by-step explanation:

Given:

Initial velocity of the arrow is,

The arrow goes up and come back to the same starting position. So, initial position is same as that of final position.

Therefore, displacement of the arrow is 0 m.

The displacement of the arrow is given as:

  (equation 1)

Plug all value in equation 1 and solve for

    where

∴ After 14.92 seconds, the arrow hits the ground.