Laws Of Motion Question 75
Question: Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is [CBSE PMT 1990]
Options:
A)$ 45{}^\circ $
B) $ 120{}^\circ $
C) $ 150{}^\circ $
D) $ {{60}^{r}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ F=\sqrt{{{(F)}^{2}}+{{(F)}^{2}}+2F.F\cos \theta } $ therefore $ \theta =120{}^\circ $
