A-LEVEL PHYSICS: 4.5.2: Conservation of Momentum (SaveMyExams)

Question 1

The Principle of Conservation of Momentum:

Answer 1

Total Momentum Before Collision = Total Momentum After Collision

Question 2

Momentum is a ___ Quantity, therefore: (2)

Answer 2

-Opposing Vectors can cancel each other out, resulting in a Net Momentum of 0.

-An object that collides with another object & rebounds, has a +ve Velocity Before the Collision, & a -ve Velocity After the Collision.

Question 3

Momentum is always…

Answer 3

Conserved

Question 4

When does the Law of Conservation of Momentum apply?

Answer 4

When no External Forces act on the System.

Question 5

What are ‘External Forces’?

Answer 5

External Forces are Forces that act on a System from Outside, eg Friction & Weight.

Question 6

What are ‘Internal Forces’?

Answer 6

Internal Forces are Forces exchanged by the Particles in the System, eg Tension in a string.

Question 7

Systems with no External Forces may be described as…

Answer 7

Closed / Isolated