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Vector question - class 11. |
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Answer» Answer: 10√7 Explanation: if we parallel shift f2 in such position that its tail intersects with the HEAD of f1 then the angle between the 2 vectors is 120 degree. now f2 - f1 = √f2² + f1² - 2f2.f1.cos 120 = √20² + 10² - 2(20)(10)(-1/2) ( cos120 = -1/2 ) = √400 + 100 + 200 = √700 = 10√7 hope it helped you thank you please mark it brainliest |
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