Sunday
April 20, 2014

Homework Help: PHYSICS

Posted by Matt, AGAIN on Monday, February 18, 2013 at 4:40pm.

This is the same question as last time.

"A plane is flying 25 degrees north of west at 190 km/h and encounters a wind from 15 degrees north of east at 45 km/h. What is the planes new velocity with respect to the ground in standard position?"

Elena kindly gave me this afterward

"v=190 km/h, α= 25°,
u=45 km/h, β =15°.

V(x) =v•cos α - u•sin β =…
V(y)= v•sinα+u•sinβ=…
V=sqrt{V(x)²+V(y)²}=... "

Using this formula and inputting the number accordingly, it have me an answer of V = 171.4

The answer in the back of the book has an answer of V = 227

Is it possible the book answer is wrong?

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