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

Standing on the ground 3.5 m from the wall of a building, you want to throw a package from your 1.6 m shoulder level to someone in a second-floor window 4.5 m above the ground. At what speed should you throw the package so it just barely reaches the window? At what angle should you throw the package so it just barely reaches the window?

2. Relevant equations

I looked through all my lecture notes, the book and several websites trying to find some equations that would allow me to solve this but all of them required at least one of the variables that were not given.

v_{y}= v_{0}sinθ_{0}- gt

y = v_{0}sinθ_{0}t - (1/2)gt^{2}.

x = v_{0x}t

y = xtan(θ_{0}) - gx^{2}/(2v_{0}2cos^{2}(θ_{0}))

I'm sure I'm missing a few but I don't know which would be needed, hence the post.

3. The attempt at a solution

I tried using trig to find the angle. I got 39.6442° which was incorrect according to the website, so I am stumped.

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# Homework Help: Projectile Motion given only distances

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