Rotational Inertia worked it many times.

  • Thread starter 1MileCrash
  • Start date
  • #1
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Homework Statement



In the figure below, the pendulum consists of a uniform disk with radius r = 10 cm and mass 480 g attached to a uniform rod with length L = 500 mm and mass 260 g.

Homework Equations





The Attempt at a Solution



I'm going to cut to the chase.

I'm basically going with:

I = 1/2MR^2 + M(R+l)^2 + ml^2 / 3

Where M and R are mass and radius of disk and m and l are mass and length of rod.

My final answer has come to .14653 every time, and it is wrong.
 

Answers and Replies

  • #2
1,331
40
They snuck cm/mm in there, never mind.



Bastards.
 

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