- #1
sarah08
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Homework Statement
A boy is standing on the peak of a hill (downhill), and throws a rock, at what angle from himself to the horizontal should he throw the rock in order for it to travel the greatest distance.
Answer clues:
1. if, the angle from the slope to the horizontal = 60, then the angle from the horizontal to the boy =15
2. the angle is not 45 degrees
Homework Equations
vf^2 = vo^2 + 2ad
sin2(theta) = 1
cos^2(theta) + sin^2(theta) = 1
The Attempt at a Solution
I tried to solve this by changing the axis so that the slope is the x axis, and then solving using the first kinematic equation above, i finally ended up solving for vo, which was ( 1+ 2cos(theta) + sin 2(theta) )/2...i doubt that is right though, I just don't know how to put all of this together!
some help would be appreciated