Conservation of Momentum _ A-Level Physics

The video tutorial explains the concept of conservation of momentum, stating that the total momentum in a closed system remains constant before and after a collision. It provides an example involving an ice hockey player and a practice dummy to illustrate this principle. The tutorial then distinguishes between elastic and inelastic collisions, noting that elastic collisions conserve kinetic energy, while inelastic collisions do not. An example of an inelastic collision between two particles is given, showing the loss of kinetic energy and the resulting velocities of the particles.

What does the conservation of momentum principle state about a closed system?

• The total momentum decreases after a collision.

• The total momentum increases after a collision.

• The total momentum remains constant before and after a collision.

• The total momentum changes after a collision.

In an elastic collision, what happens to the kinetic energy?

• It is completely lost.

• It is converted into sound.

• It is partially lost.

• It remains unchanged.

Which type of collision typically involves a loss of kinetic energy?

• Elastic collision

• Inelastic collision

• Neither elastic nor inelastic collisions

• Both elastic and inelastic collisions

In the example of the inelastic collision between two particles, what was the velocity of the second particle after the collision?

• 1.4 meters per second

• 2.8 meters per second

• 4 meters per second

• 2 meters per second

How much kinetic energy was lost in the inelastic collision example provided?

• 29.4 joules

• 0 joules

• 60 joules

• 30.6 joules