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A meter stick is balanced at the 50-cm mark. You tie a 20-N weight at the 20-cm mark. At which mark should a 30-N weight be placed so that the meter stick will again be balanced?
15 years ago

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bobpursley
Sum moments about the 50 cm mark.

20*30cm=30*X

x=20 cm from the fulcrum, or at the 70cm mark.
15 years ago

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