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I've looked everywhere for help for this question but i just can't seem to understand it... The question is below. It is from the SIN contest from 2001, question number 4. I wish they would have the answers posted up on the Waterloo website, but they only have the most recent contests :uhh:

1. The problem statement, all variables and given/known data

The Air farce "chicken cannon" uses compressed air of pressure 10 atmospheres (1 atm=10^5 N/m^2) to accelerate a 5 kg clump of messy food through a tube of diameter 10 cm which is 1.0 m long. The "cannon" is fired horizontally at a picture of Prime Minister Chretien that is 4.0 m away. How far in cmbelowthe aiming point does the messy food strike Chretien's image? You may assume that the pressure in the barrel stays the same during firing.

a) 1. 64 cm

b) 12.8 cm

c) 9.37 cm

d) 5. 04 cm

e) 2. 50 cm

2. Relevant equations

Pressure= Force/Area

Force=mass x acceleration

3. The attempt at a solution

P = 1 x 10^6 N/m^2

A= lw

= (10 cm)(1 m)

= 1000 cm^2

= 10 m^2

F= P x A

= (1x10^6 N/m^2)(10m^2)

= 1 x 10^7 N

accleration= Force/mass

= (1 x 10^7 N)(5 kg)

= 2 x 10^7 m/s^2

i dont know.. am i on the right track?

-thanks :shy:

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# Homework Help: Sir Isaac Newton Contest

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