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Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be:
Options
(a) 2v
(b) zero
(c) 1.5
(d) v
Correct Answer:
zero
Explanation:
If no external force actson a system of particles, the centre of mass remains as rest. So, speed of centre of mass is zero.
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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
- A body of mass 0.5 kg travels in a straight line with velocity v=a x³/², where
- In an L-C-R series resonant circuit, the capacitance is changed from C to 4C.
- A body moves with a uniform acceleration a and zero initial velocity
- The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹.
- A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force
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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