the question is how far away was a cannonball fired?(adsbygoogle = window.adsbygoogle || []).push({});

we know that the

-cannonball ricocheted along the ground an unknown amount of times before hitting the persons kneecap and shattering it.

-a three pound cannon ball has a mass of 1.36kg

-the maximum range of the cannon is 1125m

-the maximum elevation of the cannon is 30 degrees

-the cannon was on flat ground

-acceleration due to gravity is 9.8 ms-2

-no air resistance

-a kneecap is 1 cm thick

-the force needed to break a kneecap is 12000 N

-the cannon ball was about to hit the ground

-the cannon muzzle was at the same height as his knee

-the angle of incidence and reflection are the same 30 degrees for evry time it hits the ground

-each time the ball hits the ground its kinetic energy is reduced by 75%

any help to this question would be much appreciated and if you think you have the answers to my question could you please e-mail me at mmm_freak@yahoo.com.au thank you

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# I'm stuck on cannon ball qusetion can any one help

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