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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: - Which of the following statement about scalar quantity is true?
- If the cold junction of a thermo-couple is kept at 0⁰C and the hot junction is kept
- A body of mass 4 kg is accelerated upon by a constant force travels
- The force F acting on a particle of mass m is indicated by the force-time graph
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
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
- Which of the following statement about scalar quantity is true?
- If the cold junction of a thermo-couple is kept at 0⁰C and the hot junction is kept
- A body of mass 4 kg is accelerated upon by a constant force travels
- The force F acting on a particle of mass m is indicated by the force-time graph
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
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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