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A 0.07 kg toy is made up of a spring of constant 375 N/m. When you place the toy on the floor, cock the spring 7 cm and release it, the toy jumps upwards. What is in Joules the mechanical energy of the toy when sitting on the floor with a cocked spring? Use 10 m/s2 for g.

  • physics -

    I can't figure out what the censored word is, and its meaning in the problem.
    One needs to know how much the spring is compressed.

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