two vectors of given magnitude have maximum and minimum resultant equal to 21 and 1 respectively find the magnitude of their resultant when they are placed at 120 degrees with each other
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Explanation:
maximum resultant = A + B = 21
minimum resultant = A- B = 1
2A = 22
A = 11
B = 10
R = ✓( 11² + 10² + 2 x 11 x 10 cos 120⁰)
= √ (121 +100 - 110)
= ✓ (121 -10)
= ✓ (111) m
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