Answers for Practice Test #3

1. Impulse and Momentum
   v_f=9.62 m/s

2. Work and Kinetic Energy
   (don't forget to use the dot product to find the work done by the force)
   x = 9.63m

3. Collision
   V₂= - 3.46 m/s (to the left)

4. Conservation of Energy
   v = 4.238 m/s

5. Big Problem
   
   • Part 1 (A -> B) Use Conservation of Energy (with WORK)
     V₁ = 5.2m/s

   • Part 2 (B -> C) Collision (use conservation of momentum)
     v_f = 2.725 m/s

   • Part 3 (after C) Work and Kinetic Energy
     x = 3.83 m