10/23/09

Post date: Oct 23, 2009 2:37:9 AM

Bell Ringer: How much swag would Bender have to throw in order to stop completely? (see video) Assume his mass is 275 kg, his initial velocity is 2.50 x 10^5 m/sec, and he can throw an object forward at 1.50 x 10^2 m/sec faster than he is moving.

• • Questions on conservation of momentum homework?

• Football physics video

  • Conservation of momentum in 2D notes

    • Just as with projectile motion, we use trig to break up all motion into either the x or the y directions.

    • Begin by finding the x and y components of all velocities

    • Write conservation of momentum equations for the x and for the y directions

    • Solve for any unknown values

  • Example problems

  • Space video

• Page 188: 9-11, 13-15 due Monday

• Start bringing in empty 2 liter bottles!