1.

When forces \[{{F}_{1}},\,{{F}_{2}},\,{{F}_{3}}\] are acting on a particle of mass m such that \[{{F}_{2}}\] and \[{{F}_{3}}\] are mutually perpendicular, then the particle remains stationary. If the force \[{{F}_{1}}\] is now removed then the acceleration of the particle is [AIEEE 2002]

A. \[{{F}_{1}}/m\]  
B. \[{{F}_{2}}{{F}_{3}}/m{{F}_{1}}\]
C.        
D. \[{{F}_{2}}/m\]
Answer» B. \[{{F}_{2}}{{F}_{3}}/m{{F}_{1}}\]


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