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3. A meter stick has a pivot that is located in the middle (50 cm). On this
meter stick we place 150 g @ 32 cm, 300 g @ 45 cm, 100 g @80 cm and
300 g @80 cm.
a. How much mass needs to be placed at 55 cm in order to balance the
meter stick.
b. Where will you put 500 g in order to balance the meter
stick?

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