4. In a game of pool all the masses are the same and the collisions are elastic. If the white cue ball hits the #9 ball and is deflected at a 35" angle to the original line of motion. What is the angle of deflection below the original line of motion for the #9 ball? A) 35' B) 55" C) 75" D) 90 5. A box is released from rest in a frictionless semi-spherical shell and collides with an identical box sitting on a massless scale. Given that the collision is elastic, what is the reading on the scale? A) Fg B) 2Fg C) 3Fg D) none of the choices