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If two vectors are equal in magnitude and their resultant is also equal in magnitude to one of them, then the angle between the two vectors is
Options
(a) 60°
(b) 120°
(c) 90°
(d) 0°
Correct Answer:
120°
Explanation:
The angle θ between the vector A and B
Using the cosine rule, R² = A²+B²-2AB cosθ
Where R=A=B, then
R² = R²+R²-2RR cosθ
cosθ = -1/2
θ = 120°.
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Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds
- A spherical planet has a mass Mp and diameter Dp. A particle of mass
- Which of the following quantities has units but not dimensions
- Two strings A and B, made of same material are stretched by same tension
- A person can see clearly objects only when they lie between 50 cm and 400 cm from
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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