Question

What is the kinetic energy of a 1.5x10^3 kg (1500 kg using sig figs) car traveling at 25 m/s?

Answer 1

$$KE=\dfrac{1}{2}mv^2,$$ $$KE=\dfrac{1}{2}\cdot1500\ kg\cdot(25\ \dfrac{m}{s})^2=4.68\cdot10^5\ J.$$