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Two particles P and Q move towards with ...

Two particles P and Q move towards with each other from rest with the velocities of 1 and `20 ms^(-1)` under the mutual force of attraction. The velocity of centre of mass is

A

`20 ms^(-1)`

B

`20ms^(-1)`

C

`30 ms^(-1)`

D

zero

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The correct Answer is:
D
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FULL MARKS-MOTION OF SYSTEM OF PARTICLES AND RIGID BODIES-ADDITIONAL QUESTIONS SOLVED - I ( MULTIPLE CHOICE QUESTION)
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  2. The motion of center of mass depends on

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  6. The positon of center of mass can be written in the vector form as

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  7. The positions of two masses, x1 and x2. The position of center of mass...

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  8. In a two particle system, one particle lies at origin another one lie...

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  9. State the principle of moments .

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  10. Infinitesimal quantity means

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  11. In the absence of external forces the center of mass will be in a stat...

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  12. The activity of the force to produce rotational motion in a body is ca...

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  13. The moment of the external applied force about a point or axis of rota...

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  14. Torque is given as

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  15. The magnitude of torque is

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  16. The direction of torque acts

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  17. The unit of torque is

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  18. The direction of torque is found using

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  19. If the direction of torque is out of the paper then the rotation produ...

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  20. If the direction of the torque is inward the paper then the rotation i...

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