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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
- A potentiometer wire of length 100cm has a resistance of 10Ω. It is connected in series
- A small oil drop of mass 10⁻⁶kg is hanging in at rest between two plates seperated
- when a magnetic field is applied on a stationary electron, then it
- A solid cylinder of mass 50kg and radius 0.5 m is, free to rotate about the horizontal axis
- At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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