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31-03-2017
Physics

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two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

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dross50 dross50

31-03-2017

The KE equation is 1/2(mass)(velocity^2)
1/2(3)(1600)=(3)(800)=2400J
1/2(6)(1600)=(6)(800)=4800J

The ratio is 1:2

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