Homework Help: calculus

Posted by Dydy on Monday, January 9, 2012 at 8:14pm.

A projectile is shot upward from the surface of the Earth with an initial velocity of 120 meters per second. What is its velocity after 5 seconds?

calculus - Reiny, Monday, January 9, 2012 at 8:19pm
Height = -4.9t^2 + 120t
d(height)/dt = -9.8t +120

when t=5
velocity = -9.8(25)+120 = -120 m/s

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