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April 1, 2015

April 1, 2015

Posted by **Anna** on Monday, November 19, 2012 at 10:46pm.

- Physics -
**Elena**, Tuesday, November 20, 2012 at 1:07pmCosine Law

u=sqrt(V²+v²-2•V•v•cos135°)=

=sqrt(200²+90²-2•200•90•cos135°)=

=sqrt(40000+8100 +25455.8)=271 km/h

s=u•t=271•3=813 km

Sine Law

271/sin135°=90/sinβ

sinβ=90•sin135°/271=0.235

β=13.6° (northwest, respectively west direction)

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