Kinematics Question 10
Question: Forces $ F_1 $ and $ F_2 $ act on a point mass in two mutually perpendicular directions. The resultant force on the point mass will be [CPMT 1991]
Options:
A) $ F_1+F_2 $
B) $ F_1-F_2 $
C) $ \sqrt{F_1^{2}+F_2^{2}} $
D) $ F_1^{2}+F_2^{2} $
Correct Answer: C $ F=\sqrt{F_1^{2}+F_2^{2}+2F_1F_2\cos 90{}^\circ } $ $ =\sqrt{F_1^{2}+F_2^{2}} $
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