Seema tries to open a nut with the help of a spanner of length 20 cm by applying a force of 100 N on it
but fails to do so. She then picks up another spanner of length 40 cm, applies the same force on the nut
and succeeds to open it. How much increase in the moment of force helps her to complete the work?
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Answer:
she has increased 2o centimetres
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