A father and his seven-year-old daughter are facing each other on ice skates. With their hands, they push off against one another. Which of the following is a true statement?
  1. The father, being larger and stronger, exerts a larger force on his daughter.
  2. The father and daughter experience equal but opposite accelerations.
  3. The father and daughter exert equal forces on eachother
  4. The father experiences an acceleration of larger magnitude than his daugther.