# physic

two force10n and20n are inclined at an angle 60 degree to each.find the resultant forces are now made to be inclined at120degree to each other,find the magnitude of the new resultant force

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1. 90

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2. 100+400-2*10*20*cos60=100+400-400*1/2=500-200=300=√300=17.32050808

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