KEY TAKEAWAYS •
In looking at displacement or velocity in two dimensions, you need to get a coordinate system to define the x and y components of the vectors.
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According to the Pythagorean theorem, the square of the x component plus the square of the y component will add to make the square of the hypotenuse (the actual displacement or velocity).
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There are multiple equations you should memorize that will tell you the actual displacements and velocities in equations involving 2-dimensions.
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The range is the total distance a projectile will go when shot from a gun, cannon, or other device when it is shot at a certain velocity and at a certain angle.
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Relative velocity depends on the thing you are choosing the velocity to be relative to. It can be relative to the earth or to the boat or other craft.
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