Answer to Question #86595 in Mechanics | Relativity for Lawrence
The resistance of two forces which are of 130N and 90N is 150N. Calculate the angle between the two forces
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2019-03-19T12:19:02-0400
Using the cosine rule,
∣F1−F2∣2=F12+F22−2F1F2cosθwe obtain
cosθ=2F1F2F12+F22−∣F1−F2∣2
cosθ=2×130×901302+902−1502=0.1068
θ=84∘
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