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physics (emergency!)

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How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 1.99 106 m/s?

  • physics (emergency!) - ,

    It is equal to the kinetic energy of the electron.

  • physics (emergency!) - ,

    how do you find the kinetic energy though?

  • physics (emergency!) - ,

    0.5*mass*velocity squared

  • physics (emergency!) - ,

    I tried that but the answer I came up with was incorrect... Are you sure that's the right way to solve this?

  • physics (emergency!) - ,

    the kinetic energy on e- is negative

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