Answer to Question #302953 in Atomic and Nuclear Physics for Physicshelp

Question #302953

If a Saturn V rocket with an Apollo spacecraft attached had a combined mass of 3.1 × 105 kg and reached a speed of 11 km/s, how much kinetic energy would it then have?


1
Expert's answer
2022-02-28T10:38:08-0500

The velocity of rocket is significantly smaller than light speed, so the kinetic energy is E=mv22=3.1105kg(11103m/s)22=1.881013J.E = \dfrac{mv^2}{2} = \dfrac{3.1\cdot10^5\,\mathrm{kg}\cdot(11\cdot10^3\,\mathrm{m/s})^2}{2} = 1.88\cdot10^{13}\,\mathrm{J}.


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