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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
- The electric field at a distance 3R / 2 from the centre of a charged conducting
- For a satellite escape velocity is 11 kms⁻¹.If the satellite is launched at an angle
- A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid
- The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
- A motor-cyclist drives a motor cycle in a vertical circle. His minimum velocity
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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