SOLUTION: use the formula h = rt - 4.9t2
a projectile is fired upward with an initial speed of 2940 m/s. After how many minutes does it hit the ground?
how do we figure this out? w
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Question 126872This question is from textbook algebra 1
: use the formula h = rt - 4.9t2
a projectile is fired upward with an initial speed of 2940 m/s. After how many minutes does it hit the ground?
how do we figure this out? we are stuck! thanks
This question is from textbook algebra 1
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
I'm assuming that r is the initial speed in .
Also, I'm assuming that the units of 4.9 are .
That's your gravity terms (1/2 g).
At time t=0 seconds, the projectile is on the ground, about to be fired.
You need to find the next time h(t)=0.
Divide both sides by (t).
Add (4.9t) to both sides
Divide both sides by (4.9).
In 600 seconds, the projectile will hit the ground.
600 seconds = 10 minutes.
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