(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Question: Inbar and Luc are captured by angry natives on a desert island, after their plane crashes. They need to jump over a pit filled with snakes. They jump up at an angle of 23 degrees and need to land 8.7 meters away in x. What does their take off speed have to be?

The variables given are in the problem. My biggest problem is I don't understand how to combine the x and y equations in projectile motion. Here are the variables I think I have but please correct me if I am wrong.

a=-9.81m/s^2

x=8.7m

Vfy=0m/s

Vi=?

t=?

Is there anything else I need to find or any other variables I should already know from the problem?

2. Relevant equations

Here are some equations which I have tried using.

Vfy=Viy+ayt

X=Vi,avg t

3. The attempt at a solution

So here is what I have tried. It's not much but it's my small attempt.

First I set up a right triangle trig problem. Then I used tangent to find that viy=3.7. Next I used Vfy=Viy+ayt to try to find t. From here I get kinda stuck. I don't even know if the first part was correct but at least I tried.

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# Homework Help: Honors physics basic projectile motion question

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