Question

4. Why is momentum conserved with elastic and inelastic collisions, but kinetic energy is only conserved with elastic collisions? 5. A 2000 kg meteorite has a speed of 80 m/s just prior to colliding with Earth and getting burried. What is the recoil speed of Earth? (Mass of Earth = 5.98 x 10$^{24}$ kg) 6. A ball of mass 1 kg is dropped from a height of 3 m. Assume no air resistance. After it bounces off the ground it only reaches a height of 2 m. What is the change in momentum of the before and after the bounce?

          4. Why is momentum conserved with elastic and inelastic collisions, but kinetic energy is
only conserved with elastic collisions?
5. A 2000 kg meteorite has a speed of 80 m/s just prior to colliding with Earth and getting
burried. What is the recoil speed of Earth? (Mass of Earth = 5.98 x 10$^{24}$ kg)
6. A ball of mass 1 kg is dropped from a height of 3 m. Assume no air resistance. After it
bounces off the ground it only reaches a height of 2 m. What is the change in momentum
of the before and after the bounce?

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4. Why is momentum conserved with elastic and inelastic collisions, but kinetic energy is
only conserved with elastic collisions?
5. A 2000 kg meteorite has a speed of 80 m/s just prior to colliding with Earth and getting
burried. What is the recoil speed of Earth? (Mass of Earth = 5.98 x 10^24 kg)
6. A ball of mass 1 kg is dropped from a height of 3 m. Assume no air resistance. After it
bounces off the ground it only reaches a height of 2 m. What is the change in momentum
of the before and after the bounce?

Added by Meredith D.

Practice Problem in Physics for the JEE Main and Advanced

Abhay Kumar 2015 Edition

Chapter 6

Instant Answer

Solved by Expert Ankur S

Step 1

Momentum is conserved in both elastic and inelastic collisions because it is a fundamental principle of physics. In a collision, the total momentum of the system before the collision is equal to the total momentum after the collision. This is because momentum is a Show more…

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4. Why is momentum conserved in elastic and inelastic collisions, but kinetic energy is only conserved in elastic collisions? 5. A 2000 kg meteorite has a speed of 80 m/s just prior to colliding with Earth and getting buried. What is the recoil speed of Earth? (Mass of Earth - 5.98 x 10^24 kg) 6. A ball of mass 1 kg is dropped from a height of 3 m. Assume no air resistance. After it bounces off the ground, it only reaches a height of 2 m. What is the change in momentum before and after the bounce?

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