- #1
mandi_ah
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HI!
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
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 cm below the 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
Pressure= Force/Area
Force=mass x acceleration
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 don't know.. am i on the right track?
-thanks :shy:
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
Homework Statement
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 cm below the 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
Homework Equations
Pressure= Force/Area
Force=mass x acceleration
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 don't know.. am i on the right track?
-thanks :shy: