- #1
megg0230
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Homework Statement
A rifle bullet is fired at an angle of 30 degrees below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high. How far from the base of the cliff does it strike the level of ground below
g=9.8
initial velocity- 800 m/s
y=80 m
Homework Equations
People i ask say..
R=(initial velocity squared x sin(2 theta)
g
The Attempt at a Solution
i did
800^2 x sin2(30)
9.8
i get 56556.76106-which seems way to high
Then i did Soh Cah Toa
Sin=Opp/Adj
56556.76106/80
and got 706.9595133
I really just don't understand what i am doing, and need help. bad. this is due tomorrow.