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If no external force acts on the system ...

If no external force acts on the system
(a) Acleleration of centre of mass is zero
(b) Velocity of centre of mass is zero
(c ) Centre of mass may be at rest (or) moving with constant velocity
(d) Velocity and momentum of centre of mass remains constant

A

a, b and c are true

B

a, c and d are true

C

b, c and d are true

D

a, b, c and d all are true

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The correct Answer is:
B
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AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-EXERCISE - 1A
  1. The centre of mass of the system of particles depends on (a) masse...

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  2. Statements : (a) Allgebric sum of moments of mass about centre of ma...

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  3. If no external force acts on the system (a) Acleleration of centre...

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  4. Statements : (a) The motion of the centre of mass can be studied u...

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  5. Statements : (a) Motion of centre of mass depends on external forc...

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  6. The moon moves around the earth in a circular orbit and the earth move...

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  7. A particle moves along a horizontal circle witrr constant speed. If 'a...

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  8. Identify the increasing order of the angular velocities of the followi...

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  9. When a body is whirled in a vertical circle such that its total mechan...

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  10. Moment of inertia of a rigid body depends on (A) Mass of body (...

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  11. Statement - A : If a uniform metal disc is remoulded into a solid sphe...

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  12. Consider the following two statements. (A) Linear momentum of the ...

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  13. Identify the correct order in which the values of M.I. decreases for t...

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  14. Four objects with the same mass and radius are spinning freely about a...

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  15. A man is spinning in the gravity free - space changes the shape of the...

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  16. A thin rotates about an axis passing through its centre and perpendicu...

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  17. Which of the following statements are correct ? (a) centre of mass...

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  18. {:(,"List - 1",,"List - 2"),((a),"Centre of mass of large uniform ring...

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  19. {:(,"List - 1",,"List - 2"),((a),"Position of c.m of a triangle",(e ),...

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  20. {:(,"List - 1",,"List - 2"),((a),"Position of centre of mass",(e ),"is...

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