1. airplaine flying into head wing travels 1800 miles in 3 hrs and 36 minuntes. on the ruturn flight the same distance is trvelled in 3 hrs. find the speed of the plain in still air and the speed of the wind assuming that both remain constant trhoughout the trip.
Problem 2.
when two forces are applied to a beam newton's law suggegts that the forces F1 F2 and F3 are the solution of the system
3F1 + F2 - F3= 2
F1- 2F2+ F3 =0
4F1-F2+ F3 =0
find the forces
2006-10-30 00:27:45 · 1 answers · asked by chiro 1 in Science & Mathematics ➔ Physics
Plane speed = x
Wind speed = y
So, 18(x-y)/5 = 1800
or x-y = 500
And x+y = 600
So, x = 550 mi/h
y = 50 mi/h
Adding 1st and 2nd we get
4F1-F2 = 2
So, 2+F3 = 0
or F3 = -2
Thus 3F1+F2 = 0
F1-2F2 = 2
F1 = 2/7
F2 = -6/7
2006-10-30 00:37:36 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋