Two forces 20N and 5N are acting at an angle 120 between them . What is the magnitude of their resultant?
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A= 20
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B=5
Angle(∅)=120
|R|²=A²+B²+2ABcos∅
R²=20²+5²+2×20×5×cos120°
R²=400+25+200×(-1/2)
R²=425+(-100)
R²=425-100
R²=325
R=√325
R≈18.02
A= 20
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B=5
Angle(∅)=120
|R|²=A²+B²+2ABcos∅
R²=20²+5²+2×20×5×cos120°
R²=400+25+200×(-1/2)
R²=425+(-100)
R²=425-100
R²=325
R=√325
R≈18.02
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