# Physics helpppp?

Refer to diagram 1.

A "massless" rod of length 16.5 cm has three point masses along its length:

- M1 on the left end has mass 20.9 kg.

- M2 on the right end has mass 75.7 kg.

- M3 is one-third of the way from the left end, and has mass 85.2 kg. .

The system rotates at angular speed ω = 5.51 rad/s about an axis perpendicular to the rod, and passing through the center of the rod (not the center of mass!) Find the kinetic energy of the system, in Joules.

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