CAPE Physics Unit 1 · 2016 · Paper 1 · Question Q12

Two cars that have the same kinetic energy travel with a velocity V_1 and V_2 respectively. If the mass of the first car is twice the mass of the second car, then which of the following expressions represents the velocity of the first car?

1. (A)\frac{V_2}{2}
2. (B)\frac{V_2}{\sqrt{2}}
3. (C)2V_2
4. (D)\frac{(V_2)^2}{2}