physics
posted by Anonymous on .
calculate the range of the projectile using the initial speed and angle. use 9.8m/s. Initial speed 18m/s and the is 75 degrees. I came up with 8.29 is that right

At the max. height, Vf = o.
Vf^2 = Vi^2 + 2gah = o,
(18)^2 + 2*(9.8)h = 0,
324  19.6h = 0,
19.6h = 324,
h = 324 / 19.6 = 16.5m = Range.
Your ans. is twice mine; check your math for error.