1.

The resultant of two forces \[3P\] and \[2P\]is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is            [KCET 2001]

A.             \[{{60}^{\text{o}}}\]          
B.           \[{{120}^{o}}\]
C.             \[{{70}^{o}}\]         
D.             \[{{180}^{o}}\]
Answer» C.             \[{{70}^{o}}\]         


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