# Physics

Two pans of a balance are 50cm apart. If the fulcrum is displaced by 1cm what percentage is the true weight marked up?

the answer i got was 1.3%,

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1. If the fulcrum is displaced 1 cm away from unknown mass M, the reference mass m that balances M satisfies the relation:
24m = 26 M
m = 13/12 M
If the fulcrum is in the correct place in the middle, M = m.
The person who is buying a mass M will be charged for a mass m, the balancing weight.
So M will be "marked up" 8.3%

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posted by drwls

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