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Two bodies of mass 1 kg and 3 kg have positive vectors i + 2j + k and -3i -2j + k respectively. The centre of mass of this system has a position vector:
Options
(a) -2i – j + k
(b) 2i – j – 2k
(c) -i + j + k
(d) -2i + 2k
Correct Answer:
-2i – j + k
Explanation:
The position vector of othe centre of mass of two particle system is given by
R⃗ = m₁R⃗₁ + m₂R⃗₂ / (m₁ + m₂)
= 1/4 [-8i -4j + 4k] = -2i -j + k
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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
- Mass and diameter of a ring is 2 kg and 1 m respectively. The moment of inertia
- Assertion(A) :The change in kinetic energy of a particle is equal to the work done
- When a mass M is attached to the spring of force constant k,
- A magnet of length 10 cm and magnetic moment 1 A-m² is placed
- A charged particle enters a uniform magnetic field with a certain speed at right angles
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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