Physics Two Dimensional Motion Question 120
Question: If the magnitudes of vectors A, B and C are 12, 5 and 13 units respectively and A + B = C, the angle between vectors A and B is:
Options:
A) 0 B)$ \pi $ C) $ \frac{\pi }{2} $ D)$ \frac{\pi }{4} $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ 13^{2}=12^{2}+5^{2}+2\times 12\times 5\cos \theta $
$ \
Therefore \theta =90{}^\circ $
BETA
