Momentum and Impact
This week in Physics, we learned about momentum and impact.  The Law of Conservation of momentum states that in an isolated system momentum will be conserved.  Momentum is measured in kg • m/s and can be found using the formula P=m • v (P=momentum, m=mass, and v=velocity).  In the picture below, the momentum of the wave carries the surfer along its face.  This momentum transfers to the surfer allowing him to move with the wave.  This momentum can be manipulated by the surfer allowing him to perform maneuvers.  Momentum in = momentum out.

We also learned about impact.  Shorter impact time = greater impulse.  Longer impact time = less impulse.  In the water balloon toss activity the balloon broke when it hit the ground because of its short impact time.  When the sheet caught the balloon it did not break because it increased its impact time.