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Explosion is due to...

Explosion is due to

A

Internal forces

B

External forces

C

Both 1 and 2

D

Neither 1 and 2

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The correct Answer is:
A
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(A) : When a body is dropped from a height explodes in mid air, but its centre of mass keeps moving in vertically downward direction. (R ) : Explosion occur due to internal forces only.

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AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-EXERCISE-I (Centre of Mass)
  1. Choose the wrong statement

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  2. Choose the correct statement :

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  3. Explosion is due to

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  4. The path of the centre of mass of earth-moon system around the sun is

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  5. (A): When a shell at rest explodes, the centre of mass fragments Conti...

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  6. A bomb travelling in a parabolic path under the effect of gravity, exp...

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  7. All particles of a body are situated at a distance R from the origin. ...

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  8. A square plate and a circular plate made up of same meterial are place...

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  9. A uniform sphere is placed on a smooth horizontal surface and a horzon...

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  10. For which of the following doesthe centre of mass lie outside the body...

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  11. (A) : Heavy boxes are loaded along with empty boxes on a cart. Heavy b...

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  12. (a) Algebaric sum of moments of masses about centre of mass is zero ...

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  13. A trolley filled with sand moves on a smooth horizontal surface with a...

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  14. In which of the following cases the centre of mass of a rod is certain...

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  15. Identify the correct statement. In the absence of external force, ...

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  16. P is the centre of mass of a system of four point masses A,B,C and D, ...

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  17. Mass of a ring is non-uniformly distributed around its geometric centr...

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  18. A disc of radius Y is removed from the disc of radius .R. then (a) T...

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  19. In pure rolling motion of a ring (a) it rotates about instantaneous ...

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  20. A tank filled water is connected to another empty tank lying to the ri...

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