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December 20, 2014

December 20, 2014

Posted by **Yarielis** on Saturday, March 8, 2014 at 10:28am.

- Physics -
**Damon**, Saturday, March 8, 2014 at 11:24amNot much of a cannon :)

time to fall to ten meters = time to rise ten meters

10 = (1/2) g t^2 = 4.9 t^2

t = 1.43 seconds up or down

v = Vi - g t

0 = Vi -9.81 (1.43)

Vi = 14 m/s muzzle velocity

now at 33 deg

u = 14 cos 33 = 11.8 m/s forever

Vi = 14 sin 33 = 7.62 initial speed up

How long to top?

0 = 7.62 - 9.81 t

t = .777 seconds going up

so

time in air = 1.55 s

so horizontal distance = 11.8*1.55 =18.3 meters

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