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

Three different mass projectiles, mA > mB > mC, are launched from the top of a building at different angles with respect to the horizontal. Each particle has the same initial kinetic energy.

Which particle has the greatest kinetic energy just as it hits the ground? Why?

Which particle has the greatest speed just as it hits the ground? Why?

2. Relevant equations

(KE + PE)i = (KE + PE)f

KE = .5 mv^2

PE = mgh

3. The attempt at a solution

I don't know if it is the particle that has the highest mass m or attains the highest height h. Obviously, the one that attains the highest point will have the highest final velocity. vf = sqrt(2gh)

My teacher said that's wrong and now I don't know what to put.

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# Homework Help: Final Kinetic Energy and speed of three projectiles fired from a building's roof

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