Kinematics Question 434
Question: What is correct?
Options:
A) $ |\vec{a}-\vec{b}| \leq |\vec{a}| + |\vec{b}| $
B) $ |\vec{a}-\vec{b}|\ge ||\vec{a}|-|\vec{b}|| $
C) $ |\vec{a}-\vec{b}|\ge |\vec{a}|-|\vec{b}| $
D) $ |\vec{a}-\vec{b}| \geq ||\vec{a}| - |\vec{b}|| $
Show Answer
Answer:
Correct Answer: D
Solution:
$ \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}| $ .
BETA
