- #1
neoncrazy101
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Homework Statement
A projectile of mass 0.656 kg is shot straight up with an initial speed of 25.4 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 7.64 m, determine the magnitude of the average force due to air resistance.
Homework Equations
1/2mvf^2 + mghf = 1/2mvo^2 + mgho
Work = KE+ PE
W = Fcos(90)s
The Attempt at a Solution
Ok, I am able to get the answer for A: (32.9m) but with B, I cannot get it. What should I do to get the answer for B? Whenever I put the equation into W = Fcos(90)s I come up with zero which is not the answer. So I don't know what I'm doing wrong.