Thank you all again. You're help is appreciated. Hopefully I won't have to come on here too often, but if I do you guys are the first place to help me deal with my problems. Physics related problems of course, but problems nonetheless. :]
Is it really that simple? And you want the instantaneous velocity, because the average velocity incorporates the time when there was no velocity. You want it at that time.
Makes sense. I appreciate all of your help.
Okay, I calculated a velocity of 8.88 m/s, because the height is 15.5 m at t = 1.75.
(15.5-0)/1.75 to get the 8.88 m/s
So, I get
0 = (1/2)(-9.8)t2 + 8.88t +15.5
Solve for t with a polynomial function, and get t = -1.09 and 2.90. Time can't be negative and 2.90 isn't the right...
Homework Statement
The height of a helicopter above the ground is given by h = 2.90t3, where h is in meters and t is in seconds. At t = 1.75 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?
Homework Equations
I used xf =(1/2)at2...