Physics, 20.11.2020 06:30, ReaLily

Mary has a mass of 40 kg and sprints at 1 m/s. Mary has 20 J kinetic energy.
Roberto has twice the mass his sister Mary has (see above) but runs at the same velocity as Mary. Will his kinetic energy be twice as much?

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Mary has a mass of 40 kg and sprints at 1 m/s. Mary has 20 J kinetic energy.
Roberto has twi...