1. The problem statement, all variables and given/known data A car and a truck have the same kinetic energy, but the car's mass is one fifth that of the truck. Compare the velocity and momentum of the car with those of the truck. 2. Relevant equations KE=1/2mv^2 p=mv 3. The attempt at a solution I am not really sure what to do here. I tried setting up the Kinetic energy equal to each other, but then the mass and velocity would cancel each other out an I am left with 1/2=1/10. My other method was subtracting the 2 energys, but that doesn't make sense now that im thinking about it... Any tips on how to do this?