Answer to Question #136631 in Field Theory for lou

Question #136631
An electric car is being driven through a town at 22 m/s. The kinetic energy of the car is 222640 J. Calculate the mass of the car.
1
Expert's answer
2020-10-05T10:53:39-0400

The kinetic energy

KE=mv22{\rm KE}=\frac{mv^2}{2}

Hence, the mass of a car

m=2KEv2=2×222640J(22m/s)2=920kgm=\frac{2{\rm KE}}{v^2}=\rm\frac{2\times 222640\: J}{(22\: m/s)^2}=920\: kg

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