Flight of a Projectile
View the Lesson | MATHguide homepage Updated October 31st, 2016

Hint: Use a graphing calculator to help solve this problem.

Given:    A projectile is launched upward at a velocity of 390 ft/sec on Earth. The projectile starts at an initial vertical distance of 110 feet.
  
Find:a)Write the function that describes the height of the projectile with respect to time.
   h(t) = t2 + t +
 
b)At what time does the projectile reach the maximum height?
[Round your answer to the nearest tenth.]
    seconds
 
c)Determine the maximum height of the projectile.
[Round the answer to the nearest foot.]
    feet
 
d)At what time does the projectile reach ground level?
[Round your answer to the nearest tenth.]
    seconds