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∘

B) 120∘

C) 150∘

D) Math input error

Show Answer

Answer:

Correct Answer: B

Solution:

F=(F)2+(F)2+2F.Fcos⁡θ therefore θ=120∘

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