Kinematics Question 434
Question: What is correct?
Options:
A) $ |\vec{a}-\vec{b}|=|\vec{a}|-|\vec{b}| $
B) $ |\vec{a}-\vec{b}|\le |\vec{a}|-|\vec{b}| $
C) $ |\vec{a}-\vec{b}|\ge |\vec{a}|-|\vec{b}| $
D) $ |\vec{a}-\vec{b}|<|\vec{a}|-|\vec{b}| $
Correct Answer: D [d] $ \vec{a}-\vec{b} $ it’s nothing but addition of $ \vec{a} $ and $ -\vec{b} $ . So, the magnitude of $ \vec{a}-\vec{b} $ will lie between $ |\vec{a}|+|\vec{b}| $ and $ |\vec{a}|-|\vec{b}| $ .
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