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Select the correct alternative. When the...

Select the correct alternative. When there is no external force acting on a system of particles,

A

The centre of mass does not move

B

The centre of mass does not accelerate

C

The momentum of the system remains same

D

The kinetic energy of the system does not change

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AAKASH INSTITUTE-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Assignment (Section - C) Objective Type Questions (More than one option are correct)
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  5. When a bullet is fired from a gun

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  8. If a sphere of mass m moving with velocity u collides with another ide...

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  9. Two projectiles collide in air, then for just after and before the col...

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  10. Two particles A and B of masses 2kg and 3kg moving on a smooth horizon...

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  11. A particle strikes a smooth horizontal surface at an angle theta gt 0 ...

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  12. A girl throws the ball with horizontal velocity 2m//s at the moment t=...

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  13. A fan is switched on and it accelerates at a constant angular accelera...

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  14. A block of mass m is connected to another block of mass M by a massles...

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  15. A disc of mass M and radius R as shown in figure has some points on it...

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  16. A rod of mass m and length L is pivoted at the bottommost point O and ...

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  17. A rod of mass m and length L is pivoted at a point O and kept in horiz...

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  18. A horizontal rod of mass M and length L is tied to two verticle string...

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  19. A disc of radius R is moving on a rough horizontal surface with veloci...

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  20. A disc of given some velocity up the incline so that it goes up, stops...

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