I completely understand how normal projectiles work on a "flat" world using the x and y components.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]x\; =\; V_{x}t\; +\; x_{o}[/tex]

[tex]y\; =\; Vyt\; +\; y_{o}\; +\; 0.5gt^{2}[/tex]

I am confused if we place the earth on the XY plane and launch a projectile at some angle. How are the equations different?

It seems that both Y and X equations should contain a gravity component using sine or cosine to take this into account. If no gravity in the x equations exists, the projectile would never come back to earth.

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# Launching a projectile into Orbit

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