In a rotational equilibrium experiment, a group takes a one-meter ruler with a uniformly distributed mass of 250 grams. A thread will be tied to the ruler 15 cm to the left of the center of mass, swinging the ruler. Then the group places a mass m1 = 170 gr at the 20 cm position on the ruler. Then they place a mass m2 = 155 gr in the 40 cm position. A mass m3 is placed at the 15 cm position on the ruler. Determine: a) The lever arm for mass m1, m2 and m3. b) The lever arm of the ruler. c) The value of the mass m3 that balances the system.

In a rotational equilibrium experiment, a group takes a one-meter ruler with a uniformly distributed mass of 250 grams. A thread will be tied to the ruler 15 cm to the left of the center of mass, swinging the ruler. Then the group places a mass m1 = 170 gr at the 20 cm position on the ruler. Then they place a mass m2 = 155 gr in the 40 cm position. A mass m3 is placed at the 15 cm position on the ruler. Determine: a) The lever arm for mass m1, m2 and m3. b) The lever arm of the ruler. c) The value of the mass m3 that balances the system.

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