10/28/10

Post date: Oct 28, 2010 1:44:15 PM

Bell Ringer: Bell Ringer: A giant ball of garbage (m = 84,300 kg) is moving toward Mars at 26,500 m/sec at 0 degrees. Chuck Norris (whose favorite planet is Mars) roundhouse kicks a bus with a bomb at the ball at 3,650,000 m/sec at 245 degrees. The bus has a mass of 1850 kg and sticks to the ball after they collide. What is their final velocity?

• • Rocket work time

  • Review problem work time

• Chapter 9 test tomorrow

  • Review answers:

    • 1) 351 kg*m/s

    • 2) 4.8 kg*m/s

    • 3) 42 m/s

    • 4)a) 60.0 N*s

    • b) 20.0 m/s

    • 5)a) 2.04 x 10^4 N*s

    • b) 300 N

    • 6)a) 2.35 x 10^4 kg*m/s

    • b) 2.6 x 10^4 N

    • 10) 1300 sec

    • 16)a) 7.8 x 10^2 kg*m/s

    • b) -7.8 x 10^2 kg*m/s

    • c) 7.8 x 10^2 kg*m/s

    • d) -7.8 x 10^2 kg*m/s

    • e) 6.1 m/s

    • 17)a) 1.0 x 10^-3 kg*m/s

    • b) -6.0 x 10^-4 kg*m/s

    • c) 6.0 x 10^-4 kg*m/s

    • d) 1.6 x 10^-3 kg*m/s

    • e) 0.16 m/s or 16 cm/s

    • 21) 10.6 m/s

    • 31 170 kg