Question

Solve the following projectile motion problem.

12. A projectile is launched straight up from ground level with an initial velocity of
400 ft/sec. When will the projectile's height above ground be 2000 ft?​

Answer 1

The answer should be 5 seconds. Hope this helps :)

The projectile height is going at a paste of 400 feet a second, so this is concluding that 5 seconds multiply by 400 feet a second is 2000 feet