A force of 6 kg and another of 8 kg...
Question
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A force of 6 kg and another of 8 kg can be applied together to produce the effect of a single force of- (A) 1kg (B)11kg (C) 15 kg (D) 20 kg

JEE/Engineering Exams
Physics
Solution
224
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( vec{F}=sqrt{F_{1}^{2}+F_{2}^{2}+2 F_{1} F_{2} cos theta} ) ( left[vec{F}_{1}-vec{F}_{2}|leqslant| vec{F}|leqslant| vec{F}_{1}+vec{F}_{2} midright. ) ( 2 leqslant|vec{F}| leqslant mid 4 ) ( mid B)|1| z} )
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