1. The problem statement, all variables and given/known data In tryouts for the national bobsled team, each competing team pushes a sled along a level, smooth surface for 5 meters. One team brings a sled that is much lighter than all the others. Assuming that each team pushes with the same net force, compare the kinetic energy of the light sled to that of the others after 5 meters. Compare the momentum of the light sled to that of the others after 5 meters. (Hint: Think about the times involved.) Suppose the rules were changed in Question 19 so that the teams pushed for a fixed time of 5 seconds rather than a fixed distance of 5 meters. Compare the momentum of the light sled to that of the others after 5 seconds. Compare the kinetic energy of the light sled to that of the others after 5 seconds. 2. Relevant equations Don't need to calculate anything but P=mv KE=(1/2)mv^2 3. The attempt at a solution For the first one. Wouldn't the team need to push as many times faster as their bobsled is less massive? For the KE they could push much slower as the velocity is squared. For the the 2nd question: same thing!? Also, what's the difference between Force and Energy, apart from the obvious that one is in N and the other in J. I feel like it's the same concept twice .