Wednesday

April 16, 2014

April 16, 2014

Posted by **Sara** on Wednesday, March 23, 2011 at 11:05am.

- Physics -
**drwls**, Wednesday, March 23, 2011 at 11:21amAdd the momentum vectors and divide by the combined mass.

North component of momentum:

= 3000 * 45 cos 45

= 9.55*10^4 mph*lb

East component of momentum:

= -3000*45sin45 + 2000*30

= -9.546*10^4 + 6.00*10^4

= -3.546*10^4 mph*lb

The momentum magnitude is

sqrt[(9.546)^2 +(-3.546)^2]*10^4

= 1.018*10^5 mph*lb

Final velocity is that divided by 5000 lb, or 20.4 mph

If you need the direction, use the ratio of momentum components as the tangent of the angle.

It is about 20 degrees west of north.

**Related Questions**

Physics - Two cars crash into each other at an intersection on a very icy road. ...

Physics - Momentum of cars at intersection - Two cars of identical mass are ...

physics - A 1,600 kg car traveling north at 10.0 m/s crashes into a 1,400 kg car...

physical science - A small car with a weight of 2000 lb traveling at 30 mph can ...

Physics - two cars, one with mass m1=1000kg and the other with mass m2= 4000kg ...

Energy and momentum Physics - two cars, one with mass m1=1000kg and the other ...

mechanical engineering - A railroad car that weighs 20,000 lb is traveling ...

Dynamics - During a high-speed chase, a 2400-lb sports car traveling at a speed ...

physics - Two cars are traveling in opposite directions on a two lane road. Car ...

phyics - If two cars are traveling along a straight road, one behind the other...