(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] 2D Projectile Motion

So, this should be a relatively easy problem but I am thoroughly stumped and haven't a clue where to start.

A mortar used to launch fireworks fires a shell with an initial velocity [tex]v_{i}=130\mbox{m/s}[/tex] at [tex]\theta_{i}=60^o[/tex] above the horizontal. The shell explodes directly over a safety officer d = 850 meters downrange from the mortar. Assuming the ground is level, how high above the ground is the shell when it explodes? Is the shell falling as shown in the figure (refer to attachment) or is the shell still rising when it explodes? Assume that only the force of gravity acts on the shell as it flies.

Given information:

[tex]v_{i}=130[/tex] m/s

[tex]\theta_{i}=60^o[/tex]

d = 850 m

[tex]\Delta y_{i} =0[/tex] m

Any help that can be given would be greatly appreciated to at least get me started in the right area.

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# Homework Help: 2D Projectile Motion

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