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Identify the correct statement. In the a...

Identify the correct statement. In the absence of external force,
(a) the kinetic energy associated with the motion of centre of mass is conserved
(b) centre of mass is not accelerated
(c ) the centre of mass always move in curved line
(d) centre of mass must be at rest

A

a & b are correct

B

all are true

C

all are false

D

a & c are correct

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-EXERCISE - 1A
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  2. In which of the following cases the centre of mass of a rod is certain...

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

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

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  5. Mass of a ring is non - uniformly distributed around its geometric cen...

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  6. A disc of radius .r. is removed from the disc of radius .R. then (...

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  7. In pure rolling motion of a ring (a) it rotates about instantaneou...

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  8. A tank filled with water is connected to another empty tank lying to t...

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  9. Statement A : When an iron sphere on the ground is heated its centre o...

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  10. Statement A : Whrn no external force acts on a body its centre of mass...

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  11. Statements : (a) In translatory motion each point of the body expe...

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  12. Statements : (a) Centre of mass is that fixed point of a system of p...

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  13. Statements : (a) Position of C.m depends on acceleration due to grav...

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  14. Statements : (a) Ration of the distance of the centre of mass of a...

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  15. The centre of mass of the system of particles depends on (a) masse...

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

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

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

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

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

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