physics
posted by daniel .
a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground?
a) the maximun height of the projectile above the building
b) the time for the projectile to reach the top
c) the velocity of the projectile as hits the ground
d) the total time the projectile is in the air.

A. Max height = 81.549m ( above the building)
B. Time to reach max height = 4 seconds
C. Velocity = 50.80 meter per second
D. total time = 9.26 seconds