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April 18, 2015

April 18, 2015

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.

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