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An object is launched at 17.2 m/s from a 25-meter tall platform. The equation for the object's height h at time t seconds after launch is: h(t) = -4.9t^2 + 17.2t +25, where h is in meters. 

a. Graph this equation. 
b. When does the object strike the ground?

 Apr 21, 2017
 #1
avatar+33603 
+2

Here's the graph:

 

Set h(t) = 0 and solve using the quadratic equation to find the time at which the object strikes the ground (choose the positive solution!).

 Apr 21, 2017
edited by Alan  Apr 21, 2017
 #2
avatar+128089 
+2

 

Here's the graph : https://www.desmos.com/calculator/afjnvqraph

 

The  object hits the ground after about 4.616 s

 

 

cool cool cool

 Apr 21, 2017

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