9/23/10

Post date: Sep 24, 2010 1:44:15 PM

Bell Ringer: There's a bomb on a 2250 kg bus! The bus, travelling at 35.0 m/sec, drags along the sides of cars, pressing against them with a force of 125000N. The coefficient of kinetic friction between the bus and cars is 0.315, and the bust drags for 15 seconds. If the engines exert a force of 39000 N, does the bus's speed drop below 30.0 m/sec and explode?

• • Work time for practice problems and last year's test

  • Work problems together as a class to prepare for tomorrow's test