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Is it possible to have a collision in wh...

Is it possible to have a collision in which the whole of KE is lost?

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Yes. For example, in perfectly inelastic collision of two bodies moving towards each other with equal linear momenta.
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It is possible to have a triangle in which two of the angles are obtuse.

It is possible to have a triangle in which two angles are acute.

In any perfectly inelastic collision, is whole of KE lost ?

Discuss the possibility of a particular type of collision ini which the particles have more kinetic energy after the collision than before. It is known as super elastic collision. Will momentum remain conserved in such a collision

While dealing with collision between particles, you must have deal from and Inertial reference frame Often we choose that frame to be fixed in the Laboratary in which the collision is observed. So it is called the Laboratary reference frame or Lab frame From Lab frame we define an elastic collision as a collision in which KE before and after collision is conserved and a perfectly inelastic collision as a collision in which after collision the two colliding bodies have same velocity vector along the line of action of impulse during collision. If we discusss the head-on collsion between two particles from center of mass reference frame, then the velocity of center of mass (CM) will be taken to be zero in any type of collision i.e. velocity of CM before and after collision will both be zero. Since before collsion velocity of CM was zero (as our frame is fixed to CM) and no external impulse acts, it will remain zero forever If collision were elastic in above question then velocity of B after collision in CM reference frame will be:

While dealing with collision between particles, you must have deal from and Inertial reference frame Often we choose that frame to be fixed in the Laboratary in which the collision is observed. So it is called the Laboratary reference frame or Lab frame From Lab frame we define an elastic collision as a collision in which KE before and after collision is conserved and a perfectly inelastic collision as a collision in which after collision the two colliding bodies have same velocity vector along the line of action of impulse during collision. If we discusss the head-on collsion between two particles from center of mass reference frame, then the velocity of center of mass (CM) will be taken to be zero in any type of collision i.e. velocity of CM before and after collision will both be zero. Since before collsion velocity of CM was zero (as our frame is fixed to CM) and no external impulse acts, it will remain zero forever Two particles of mass 2 kg and 1kg as shown in the figure make a perfectly inelastic collision. Then if we are dealing with center of mass reference frame, the velocity of B before collision is:

If two objects collide and one is initially at rest (a) is it possible for both to be at rest after collision ? (b) is it possible for any one to be at rest after collision.?

Two particles of masses 0.5 kg and 0.25kg moving with velocity 4.0 m // s and -3.0m // collide head on in a perfectly inelastic collision. Find the velocity of the composite particle after collision and KE lost in the collision.

A moving body of mass m makes a head on elastic collision with another body of mass 2m which is initially at rest. Find the fraction of kinetic energy lost by the colliding particles after collision.

PRADEEP-WORK, ENERGY AND POWER-Very Short Anwer Question.
  1. In case of a moving body as force of friction is mumg, can we regard m...

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  2. A ball of mass m moving with vel. V strikes head on elastically with a...

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  3. Is it possible to have a collision in which the whole of KE is lost?

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  4. If two objects collide and one is initially at rest (a) is it possible...

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  5. In which, elastic or inelastic collision, the momentum is conserved ? ...

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  6. Which physical quantities are conserved in an elastic collision?

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  7. Which physical quantity is conserved in both, elastic and inelastic co...

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  8. If two bodies stick together after collision. Will the collision be el...

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  9. A bullet gets embedded in a wooden block. Where does its KE go?

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  10. A rough inclined plane is placed on a cart moving with a constant velo...

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  11. Why is electrical power required at all when the elevatore is descendi...

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  12. A body is being raised to a height h from the surface of earth. What i...

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  13. Calculate the work done by a car against gravity in moving along a str...

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  14. A body falls towards earth in air. Will its total mechanical energy be...

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  15. A body is moved along a closed loop. Is the work done in moving the bo...

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  16. In an elastic collision of two billiard balls, which of the following ...

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  17. A crane lifts a mass of 100 kg to a height of 10m in 20s. The power of...

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  18. The average work done by a human heart while it beats once is 0.5 J. C...

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  19. Give example of a situation in which an applied force does not result ...

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  20. Two bodies of unequal mass are moving in the same direction with equal...

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