# Com in Perfectly Inelastic Collision

## Trending Questions

**Q.**

A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is

30 kg

12 kg

18 kg

60 kg

**Q.**

A vessel at rest explodes into three pieces. Two pieces having equal masses fly off perpendicular to one another with the same velocity of 30 m/s. The third piece has three times mass of each of the other piece. The magnitude and direction of the velocity of the third piece would be

**Q.**

A 2 kg mass moving with a velocity of 10 ms−1 collides with another 6 kg mass moving in opposite direction with a velocity of 20 ms−1. After the collision, they stick and move together. Find their common velocity and the momentum.

**Q.**

A set of 'n' identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is L. The block at one end is given a speed 'v' towards the next one at time, t = 0. All collisions are completely inelastic, then

The last block starts moving at

The last block starts moving at

The centre of mass of the system will have a final speed v

The centre of mass of the system will have a final speed

**Q.**

A wooden block of mass M rests on a horizontal surface. A bullet of mass m moving in the horizontal direction strikes and gets embedded in it. The combined system covers a distance x on the surface. If the coefficient of friction between wood and the surface is μ, the speed of the bullet at the time of striking the block is (where m is mass of the bullet)

**Q.**

A bullet of mass m leaves a gun of mass M kept on a smooth horizontal surface. If speed of the bullet relative to the gun is v, then recoil speed of the gun will be:

**Q.**

A bullet of mass 20g travelling horizontally with a speed of 500 m/s passes through a wooden block of mass 10.0 kg initially at rest on a level surface. The bullet emerges with a speed of 100 m/s and the block slides 20 cm on the surface before coming to rest. The friction coefficient between the block and the surface is g=10 ms−2

0.50

0.24

0.16

0.32

**Q.**

A projectile of mass 50 kg is projected vertically upward with a velocity of 100 m/s. After 5 seconds it explodes into two pieces, one piece of 20 kg moving vertically upward with a velocity of 150 m/s. The algebraic sum of the momentum of the system 3 seconds later is

**Q.**

A particle of mass 100 g moving at an initial speed u collides with another particle of same mass kept initially at rest. If the total kinetic energy becomes 0.2 J after the collision, what could be the minimum and the maximum value of u?

**Q.**A spherical shell at rest at the origin explodes into three fragments of masses 1 kg, 2 kg and 'm' kg. The 1 kg and 2 kg pieces fly off with speeds of 12ms−1 along the x-axis and 8

^{ }ms−1 along the y-axis respectively. If the 'm' kg piece flies off with a speed of 40 ms−1 , the total mass of the shell must be

- 4.5 kg
- 5.0 kg
- 3.5 kg
- 4.0 kg