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Two bodies of masses m and 2m, moving wi...

Two bodies of masses m and 2m, moving with initial velocities 50 `m//s` in the + x direction and 40 `m//s` in the -x direction respectively, undergo a head -on elastic collision.
(i) Calculate their final velocities
(ii) What is the ratio of the final to initial kinetic energies for the body of mass m?
(iii) Calculate the change in momentum of each body if m= 1kg
(iv) What is the change in the momentum of the system?

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CHETANA PUBLICATION-LAWS OF MOTION -EXERCISE
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  2. A marble of mass 2m travelling at 6 cm//s is directly followed by anoo...

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  3. Two bodies of masses m and 2m, moving with initial velocities 50 m//s ...

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  4. A bodyof mass 2 kg moves at speed of 4 m//s and makes head on collisio...

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  5. A body of mass 0.5 kg moving with a velocity of 6 m//s collides with a...

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  6. A ball is dropped on a plane horizontal surface from height H. The bal...

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  7. A spring ball of mass 0.5 kg is dropped from some height. On falling f...

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  8. A ball orf mass 100 g dropped on the ground from 5 m bounces repeatedl...

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  9. One of the effects of a force is to change the momentum. Define the qu...

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  10. A bullet of mass 0.1 kg moving horizontally with a velocity of 20 m//s...

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  11. While rotating an object or while openning a door or a water tap we ap...

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  12. Why is the moment of a couple independent of the axis of rotation even...

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  13. A force vecF = (3veci + 2vecj - 4veck) N acts on a particle. The posit...

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  14. Linear velocity of a rotating fan as a whole generally zero. Is it in ...

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  15. Define centre of mass.

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  16. Define and explain rotational equilibrium:

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  17. How can the centre of mass be mathematically determined or understood?

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  18. State any 6 characteristics of centre of mass:

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  19. Define Centre of gravity:

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  20. Why do we need to know the centre of mass of an object? For which obje...

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