5.4 by Paul is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

# 5.4

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5.4 by Paul is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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On the line right before you started doing Conservation of Energy, it looks like you forgot to make the I1 and I2 terms positive.

Indeed I did, sorry.

5.4 in 11th

When you are making your EOM through Newtonian I think the I1 and I2 terms in the final equation should be positive not negative? Our lecturer said that all of those terms should always be positive?

oops, didnt see that Joel mentioned this already

When you're plugging the numbers in for your differential equation, when I do both masses in snails i get -1.047 for the second part of the equation instead of -12.6, it seems that -12.6 comes about if you do the masses in slugs, but the other part is still in snails, is this just an error or is there a reason for it?

What are you using for ? Since we're in the Inch-Pound-Second system I opted to use .

shouldn't the differentiation of total energy be with respect to time instead of y?

No, finding the EOM using conservation of energy is an application of Energy-Integral Substitution: http://www.tutorpaul.com/eis

I'm not getting your .155 value but rather .115? When you calculated moment of inertia what values did you use? I'm using the 1/2mR^2 formula and 5 as r, 12 as R for I2, and 5 as R for I1.

Tried using 12 as R for I1 and getting over .2