2. (Things that don’t go squish!)

3.  To start, lets review- In an Elastic collision for a closed system, the momentum that exist before the collision is the same that exist after the collision.  True True  False False

4.  Good job! Your right, You now are at a 2 level for elastic collisions! For an elastic collision, such as a vase breaking, or a rubber ball bouncing, the total momentum that existed before it say, hit a wall, is the same that exist after the collision

5.  Elastic collisions use the formula for conservation of energy Mv1+mv2=mv1+mv2 You know this formula, so lets use it and BREAK SOMETHING!

7.  Mass vase 1kg  Mass ball.5 kg  Velocity ball 20 m/s initially  Velocity ball 15 m/s after  What is the momentum of the pieces of the vase?

8.  1.5 1.5  2.5 2.5  3.5 3.5  4.0 4.0  4.35 4.35  4.5 4.5

9.  Good job again. You have a 3 rating so far with elastic collisions!

10.  Explain the following in your notes for discussion later. Does an objects internal energy relate to momentum?  Discuss both sides of the question in 2 paragraphs. In the first, argue against the above question, in the second, argue for it. Which argument seems more valid to you?

11.  An dad throws his daughter off his balcony and expects her to bounce off a perfectly elastic trampoline back into his arms.  Agree with the statement Agree with the statement  Disagree with the statement Disagree with the statement

12.  K- Now, to solve the worksheets were going to knock out today, find a person with a 2 or lower score. Complete the worksheet with them in pairs.