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Two particles A and B intiallly at rest,...

Two particles A and B intiallly at rest, move towards each other under a mutual force of attraction. AT the instant when the speed of A is v and the speed of B is 2 v, the speed of the centre of mass of the system is

A

`3v`

B

`v`

C

`1.5v`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
CM remains at rest if initially it is at rest.
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ALLEN-CENTRE OF MASS-EXERCISE-I
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  6. The figure shows the positions and velocity of two particle. If the pa...

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  8. A ball of mass 1 kg drops vertically on to the floor wit a speed of 25...

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  9. A particle of mass in is made to move with uniform speed v0 along the ...

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  10. Two balls of same mass are dropped from the same height h, on to the f...

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  11. An impulse vec(I) changes the velocity of a particle from vec(v)(1) to...

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  12. A particle of mass 4 m which is at rest explodes into masses m, m & 2m...

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  15. A shell is fired from a cannon with a velocity V at an angle theta wit...

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  16. A ball hits a floor and rebounds after an inelastic collision. In this...

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  17. Three balls A, B and C are placed on a smooth horizontal surface. Give...

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  18. A body of mass 1 kg strikes elastically with another body at rest and ...

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  19. A small bucket of mass M is attached to a long inextensible cord of le...

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  20. In the figure shown, a particle P strikes the inclined smooth plane ho...

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