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A child sits stationary at one end of a ...

A child sits stationary at one end of a long trolley moving uniformly with a speed V on a smooth horizontal floor. If the child gets up and runs about on the trolley in any manner, what is the speed of the CM of the (trolley + child) system ?

A

System remains unchaged

B

Increase

C

decrease

D

Increase or decrease

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The correct Answer is:
A
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AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Exercise-I
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  2. Choose the correct alternatives

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  3. A child sits stationary at one end of a long trolley moving uniformly ...

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

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

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

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

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

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  10. A disc of radius r is removed from the disc of radius R then (a) The...

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

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

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

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

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

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

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