- #1
Chas3down
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Homework Statement
Firing something at 40m/s at angle X, it lands 65meters away, give 2 angles it could be.. (Assume g=10m/s^2)(Fired at y=0)(No air resistance)
Homework Equations
D = v^2/g sin(2x)
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The Attempt at a Solution
d= v^2/g sin(2x)
65 = 40^2/10 sin(2x)
650/1600 = sin(2x)
13/32 = sin(2x)
arcsin(13/32)/2 = x
23.97/2 = x
x = 11.985
and
x = 90-11.985
But it's wrong?
Heres another form it could be in, but don't know where to go from here..
13/32 = 2sinxcosx
13/64 = sinxcosx