Homework Help: physics

Posted by Susan on Tuesday, February 26, 2013 at 12:02am.

A canon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

physics - Henry, Wednesday, February 27, 2013 at 7:25pm
a. Vo*t + 0.5g*t^2 = 17.5 m.
0 + 4.9t^2 = 17.5
t^2 = 3.57
Tf = 1.89 s. = Fall time.

b. D = Vo * Tf = 125m/s * 1.89s = 236 m.

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