Diagram for Example 2
When dealing with an object in projectile motion on an incline, we first need to use the given information to reorient the coordinate system in order to have the object launch and fall on the same surface.
Source
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"Sunil Kumar Singh, Projectile Motion on an Incline. February 2, 2013."
http://cnx.org/content/m14614/latest/
OpenStax CNX
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