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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.
Related Questions: - A and B are two metals with threshold frequencies 1.8 x 10¹⁴ Hz and 2.2 x 10¹⁴ Hz.
- Dependence of intensity of gravitational field (E) of earth with distance(r)
- A conducting sphere of radius R is given a charge Q. The electric potential
- The escape velocity from the earth is Ve. The escape velocity from a planet
- The de-Broglie wavelength of an electron moving with a velocity 1.5×10⁸ ms⁻¹ is equal
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 and B are two metals with threshold frequencies 1.8 x 10¹⁴ Hz and 2.2 x 10¹⁴ Hz.
- Dependence of intensity of gravitational field (E) of earth with distance(r)
- A conducting sphere of radius R is given a charge Q. The electric potential
- The escape velocity from the earth is Ve. The escape velocity from a planet
- The de-Broglie wavelength of an electron moving with a velocity 1.5×10⁸ ms⁻¹ is equal
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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