physic

Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is 3.6x10^5kg,how much force must he exert?Compare to the weight of the train (give as%).How much force does the train exerts on Superman?

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asked by noah
  1. vf^2=vi^2+2ad

    but a= F/mass

    solve for F

  2. be certain to change velocity initial to m/s

  3. tq

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    posted by noah

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