2D Collision Example
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Q.
A ball collides elastically with another ball of the same mass. The collision is oblique and initially second ball was at rest. After the collision, the two balls move with same speeds. What will be the angle between the velocities of the balls after the collision?
Q. A ball of mass 'm' moving with a velocity 'v' undergoes an oblique elastic collision with another ball of the same mass 'm' but at rest. After the collision, if the two balls move with different speeds after the collision, the angle between their directions of motion will be
- Less than
- More than
- Exactly
- Exactly
Q. A body of mass 'm' moving with a velocity 'v' in the x-direction collides with a body of mass 'M' moving with a velocity 'V' in the y-direction. They stick together during a collision. Then
- All the above choices are correct.
- The magnitude of the momentum of the composite body is
- The composite body moves in a direction making a angle
with the x-axis.
- The loss of kinetic energy as a result of collision is
Q. A ball of mass 20 kg moving at 2 m/s horizontally strikes another ball of mass 12 kg at rest. If after the collision, the 20 kg ball is now moving with a velocity of 1 m/s at an angle of 30° with the horizontal. Find the final velocity of the 12 kg ball.
- 2.54 i + 1.62 j
- 2.54 i - 1.62 j
- 1.89 i + 0.83 j
- 1.89 i - 0.83 j
Q.
Two equal spheres of mass m are in contact on a smooth horizontal table. A third identical sphere impinges symmetrically on them and is reduced to rest. Find the loss of K.E