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Two paricle A and B initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2V, the speed of the centre of mass of the system is

A

v

B

2v

C

3v

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
Internal forces does not change the state of C.M
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - I(H.W)
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  2. Two blocks of masses 5kg and 2kg are connected by a spring of negligib...

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  7. Two objects of masses 200g and 500g have velocities of 10i m//s and (3...

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  8. The unit vector perpendicular to vec A = 2 hat i + 3 hat j + hat k and...

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  9. If vec A= 3i + j +2k and vec B = 2i - 2j +4k and theta is the angle be...

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  10. The angular velocity of the seconds hand in a watch is

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  11. The angular displacement of a particle is given by theta = t^3 + 2t +1...

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  12. A particle is moving with uniform speed 0.5 m//s along a circle of rad...

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  13. A wheel is making revolutions about its ais with unifrom angular accel...

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  14. The shaft of a motor car rotates at constant angular frequancy of 300...

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  15. A particle P is moving in a circle of radius 'a' with a uniform ...

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  16. Initial angular velocity of a wheel is 2 rad//s .It rotates with a co...

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  17. A stationary wheel starts rotating about its own axis at constant angu...

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  18. A disc of radius 0.1 m starts from rest with an angular acceleration o...

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  19. Show that overset rarr(a). (overset rarr(b) xx overset rarr(c )) is eq...

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  20. A force is applied on a door at point P making an angle theta wit...

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