# Projectile motion

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1) A baseball is hit from a height of 0.8m. After t seconds. its height h, in metres is measured by h = -5t^2 + 20t + 0.8

a) use the method of completing the square to find the maximum height of the ball?

b) How long is the ball in the air?

Â© BrainMass Inc. brainmass.com March 4, 2021, 6:26 pm ad1c9bdddfhttps://brainmass.com/physics/velocity/completing-square-find-meximum-height-44694

#### Solution Summary

This shows how to use completing the square to find maximum height, and how to calculate how long a ball is in the air.

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