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%,

please help if wrong (which it probably is).

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asked by ralph
  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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