10/22/10

Post date: Oct 22, 2010 8:23:58 PM

• • No bell ringer. Questions about momentum or impulse-momentum problems?

  • Quiz 10 - momentum calculations and impulse-momentum theorem

  • Impulse-momentum and safety features

    • For something like a car crash, the change in momentum is a set value (your mass times initial velocity drops to zero)

    • Force and time can be manipulated, and are inversely proportional

    • Most safety features aim to decrease the force felt by a person and increase the duration of that force

    • examples: brakes, air bags, crumpling bumpers

• Conservation of momentum notes

• P. 185: 5-12