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A rigid body consists of a 3kg mass loca...

A rigid body consists of a `3kg` mass located at `vec r_1=(2hat i + 5 hat j)m` and a `2kg` mass located at `vec r_2 = (4hat i +2 hat j)m`. The position of centre of mass is

A

`(14/5 hat(j) + 19/5hati)m`

B

` (14/5 hat(i) + 19/5 hat(j))m `

C

` (19/5 hat(i) + 14/5hat(j))m `

D

0

Text Solution

Verified by Experts

The correct Answer is:
B
`bar(r)_(cm) = (m_(1)bar(r)_(1)+m_(2) bar(r)_(2))/(m_(1)+m_(2))`
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - I (C.W)
  1. A system consists of two masses connected by a massless rod lies al...

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  2. A rigid body consists of a 3kg mass located at vec r1=(2hat i + 5 hat ...

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  3. Three identical spheres each of mass m and radius R are placed touchin...

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  4. Two particles of masses 2 kg and 4 kg are approaching each other with ...

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  5. Two blocks A and B are joined together with a compressed spring . ...

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  6. A boy of mass 50kg is standing at one end of a boat of length 9m and m...

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  7. A dog weighing 5kg is standing on a flat boat so that it is 10 metres ...

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  8. Two bodies of different masses 2kg and 4kg are moving with velocities ...

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  9. If two particles of masses 3kg and 6kg which are at rest are separated...

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  10. Two bodies of 6kg and 4kg masses have their velocity 5hati - 2 hat j +...

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  11. The angular velocity of a rotating body is vec omega = 4 hat i + hat j...

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  12. The angle between the vectors (hat i + hat j + hat k) and ( hat i - ha...

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  13. The average angular velocity of the seconds hand of a watch if the sec...

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

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  15. A body rotating with uniform angular acceleration covers 100 pi (radia...

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  16. A body rotates about a fixed axis with an angular acceleration of 3 ra...

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  17. A wheel starts from rest and acquires an angular velocity of 60 rad//...

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  18. Two moving particles P and Q are 10 apart at any point . Velocity o...

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  19. Two particle move in concentio cireles of radii r(1) and r(2) such tha...

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  20. A stationary wheel starts rotating about its own axis at uniform rate ...

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