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March 5th, 2017, 08:55 PM | #1 |
Senior Member Joined: Jan 2017 From: US Posts: 104 Thanks: 5 | Algebra Velocity Problem An object is thrown from an initial height of 0 feet with an initial velocity of 160 feet per second. Solve for when it will return to the ground. Show your work and explain the steps you used to solve. |
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March 5th, 2017, 08:59 PM | #2 |
Senior Member Joined: Sep 2015 From: USA Posts: 1,860 Thanks: 968 |
Since its starting and ending altitudes are the same, 0 feet, the time it returns to the ground is twice that of when it reaches the top of its trajectory. At the top of its trajectory, its vertical speed is 0 ft/s. That should get you started. Last edited by skipjack; March 7th, 2017 at 12:13 PM. |
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March 7th, 2017, 10:08 AM | #3 | |
Math Team Joined: Jan 2015 From: Alabama Posts: 3,109 Thanks: 855 | Quote:
use Calculus. In this problem v0= 160 and s0= 0 while a is the downward acceleration is 32 feet per second per second. S+ o it will return to the ground when (-32/2)t^2+ 160t= 0. That equation should be easy to solve. It has two solutions but it should be clear which is the one you want! | |
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