| ⇦ | 
| ⇨ |
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:
- A particle has initial velocity (2i⃗+3j⃗) and acceleration (0.3i⃗+0.2j⃗). The magnitude
- Dimensional formula of magnetic field in terms of mass M, length L
- Dependence of intensity of gravitational field (E) of earth with distance(r)
- A ballon rises from rest with a constant acceleration g/8. A stone is released
- An object is seen through a simple microscope of focal length 12 cm.
Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply