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9.2k views
in Physics by (15 points)
The greatest and least resultant of two forces acting on body is 35KN and 5 KN determine the magnitude of the forces.what would be the angle between these forces if the magnitude of the resultant is stayst to be 25 KN

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1 Answer

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by (65.0k points)

a+b = 35 
a-b = 5 
so 
a = 20 
b = 15 
c2 = a2+b2 - 2 a b cos C 
625 = 400 + 225 - 2 a b cos C 
so cos C = 0 
C = 90 or 270 degrees

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