1.

Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is [CBSE PMT 1990]            

A.                              \[45{}^\circ \]            
B.                           \[120{}^\circ \]            
C.                         \[150{}^\circ \]                     
D.                         \[{{60}^{\text{o}}}\]
Answer» C.                         \[150{}^\circ \]                     


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