An air craft attempt to fly due north at 100 kmh-1. If the wind blows against it from east to west at 60 kmh-1, its resultant velocity is?
- 117 kmh-1, N31oE
- 127 kmh-1, N31oE
-
117 kmh-1, N31oW
- 127 kmh-1, N31oW
The correct answer is: C
Explanation
\(R^2 = 100^2 + 60^2\)
10000+3600 = 13600
R = \(\sqrt{13600}\) = 117km
60km & 100km = tanΞΈ = \(\frac{60}{100}\)
\(tan^{-1}\) 0.6
= 31ΒΊ west of the North
117km N31ΒΊw
There is an explanation video available .