1. The problem statement, all variables and given/known data "Supposing that at perihelion a comet is 1 Au from the sun and its speed at that point is 200km/s( in a frame of referance in which sun is stationary). Find its mean PE and KE to one sig digit. Does it satisfy the virial theorem? 2. Relevant equations K= .5mv^2 U=-GMm/r Virial theorem: 3. The attempt at a solution I know how to calculate U and K, and I know that at perihelion the V is at max, but will the K and U I find be the mean?