Kinematics Question 572
Question: If the magnitudes of vectors A, B and C are 12, 5 and 13 unit 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 $
