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Find a location to hang the third mass to balance the meter stick.

A meter stick supported at the 50 cm mark has masses of 300 g and 200 g hanging from it at the 10 cm and 60 cm mark, respectively. Where must we hang a third, 400 g mass to keep the meter stick balanced?

1. 0.30 m to the left of the point of support
2. 0.25 m to the right of the point of support.
3. 0.50 m above the point of support.
4. On the left end of the meter stick.

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