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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°.
Related Questions: - The potential energy of a weightless spring compressed by a distance D is proportional
- Under constant pressure, graph between P and 1/V is a
- A particle having a mass of 10⁻² kg carries a charge of 5 x 10⁻⁸C
- Two point objects of masses 1.5 g and 2.5 g respectively are at a distance of 16 cm
- Which of the following is a vector quantity?
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The potential energy of a weightless spring compressed by a distance D is proportional
- Under constant pressure, graph between P and 1/V is a
- A particle having a mass of 10⁻² kg carries a charge of 5 x 10⁻⁸C
- Two point objects of masses 1.5 g and 2.5 g respectively are at a distance of 16 cm
- Which of the following is a vector quantity?
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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