Wind Indicator
Posted in Watches on 09/25/2009 03:20 pm by adminwhats the speed? physics help :/?
The compass in a plane indicates that the plane is heading east; its air speed indicator reads 242.0 km/hr. There is a steady wind blowing from the north with a speed of 70.6 km/hr. What is the speed of the plane with respect to the ground?
thank you
Draw a right angled triangle... by pythagoras' theorem
x² = 242² + 70.6²
x² = 63,548.36
x =√63,548.36
x =252 km/hr in a SE direction.
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