c8 grav

• force/ gravitational attraction

  F=GMm/r^2
• gravitational acceleration

  g=GM/r^2
• altitude/velocity /speed

  v^2 = GM/r
• period of satellite orbit

  V=2πr/T
• escape velocity

  √2GM/R
• T/ mass also can

  T=2π √r^2/GM
• satelites speed in orbit

  V=GM/r
• min energy to place orbit in satelite

  PE= GMm/R