1. The problem statement, all variables and given/known data Which cases are examples of static equilibrium? 1. A box sliding down a ramp. 2. A baseball after being hit. 3. A box sliding along a horizontal surface. 4. A perfectly upright freely spinning top 5. A freely swinging simple pendulum 6. A spinning astronaut floating out in deep space. 7. A satellite orbiting Earth 2. Relevant equations ΣF = 0 Στ = 0 3. The attempt at a solution I believe it is options 4, 6 and 7.