- #1
shemer77
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Homework Statement
a fire hose sprays water with an initial velocity of 40ft/s at an angle of 60 degrees to the horizontal. Find the minimum initial velocity to hit a point on a building 15 feet to the right and 16 feet up.
The Attempt at a Solution
these are my equations but i feel like I am missing something b/c I am not sure how i would solve for velocity
r(t)=(z*cos60)T i + (z*sin(60))-16t^2) j
r'(t)=z*cos60) i + (z*sin(60)-32T) j
r''(t)=-32j