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If F⃗ is the force acting on a particle having position vector r⃗ and ? ⃗ be the torque of this force about the origin, then:
Options
(a) r⃗ . ? ⃗ > 0 and F⃗ . ? ⃗ < 0
(b) r⃗ . ? ⃗ = 0 and F⃗ . ? ⃗ = 0
(c) r⃗ . ? ⃗ = 0 and F⃗ . ? ⃗ ≠ 0
(d) r⃗ . ? ⃗ ≠ 0 and F⃗ . ? ⃗ = 0
Correct Answer:
r⃗ . ? ⃗ = 0 and F⃗ . ? ⃗ = 0
Explanation:
? ⃗ = r⃗ x F⃗ ⇒ r⃗ . ? ⃗ = 0 and F⃗ . ? ⃗ = 0
Since, ? ⃗ is perpendicular to the plane of r⃗ and F⃗ , hence the dot product of ? ⃗ with r⃗ and F⃗ is zero.
Related Questions: - What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
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Topics: Motion of system of Particles and Rigid Body
(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- What is the nature of Gaussian surface involved in Gauss’s law of electrostatics?
- The vector sum of two forces is perpendicular to their vector difference. In that case,
- Two charged spheres seperated at a distance d exert a force F on each other.
- A simple pendulum performs simple harmonic motion about x = 0 with an amplitude
- A parallel plate air capacitor has capacity C, distance of seperation between plate
Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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