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A) When a body slides on rough surface, ...

A) When a body slides on rough surface, its momentum is not conserved.
B) When a ball falls from a height, momentum of earth ball system is conserved
C) In case of explosion of flying bomb, momentum is conserved.

A

A,B are true

B

A,B,C are true

C

A,C are false

D

A is false

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-WORK, POWER & ENERGY -EXERCISE - I
  1. A sphere of mass M,, moving with a velocity V0 collides head on with a...

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  2. Let us assume that you have lifted a suitcase and kept it on a table. ...

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  3. No work is done by a force on an object if a) the force is always p...

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  4. The kinetic energy of a particle continuously increases with time. ...

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  5. One end of a light spring of spring constnat k is fixed to a wall and ...

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  6. Statement A: An engine A can perform a given work in 1 hr and engine B...

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  7. . Statement A: Energy is the cause for doing work and work is the effe...

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  8. (A): A spring has potential energy, both when it is compressed or stre...

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  9. A) When a body slides on rough surface, its momentum is not conserved....

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  10. A) Collision doesn.t require physical contact B) Collision between ...

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  11. A) For any collision, momentum transfer takes place. B) In any colli...

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  12. (A): Collision between two fundamental particles is elastic (R) : Fu...

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  13. A) When external forces are involved, momentum of the system is not co...

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  14. A) When a ball hits a wall (stationary) it returns back with same velo...

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  15. For a system to follow the law of conservation of linear momentum duri...

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  16. Consider the following statements A and B. Identify the correct choice...

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  17. . (A): Comets move around the sun in elliptical orbits. The gravitatio...

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  18. . A sphere A moving with a speed .U. and rotating with an angualr velo...

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  19. A body is in motion and it is stopped by applying retarding force. Ini...

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  20. (A): When two bodies of equal masses collide, their veloctities are al...

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