Angular momentum

Question 1

What is angular momentum?

Answer 1

Involves an object in motion around an axis

Question 2

What are the 2 things angular momentum depends on?

Answer 2

Moment of inertia and angular velocity

Question 3

What is moment of inertia?

Answer 3

The resistance of an object to a change in state when rotating

Question 4

What is angular velocity?

Answer 4

The rate of movement in rotation

Question 5

What is the formula for angular momentum?

Answer 5

Angular momentum = moment of inertia x angular velocity

Question 6

What is the relationship between moment of inertia and angular velocity?

Answer 6

They are inversely proportional so will always have an affect on one another
- As one increases, the other one decreases at the same rate

Question 7

What are the 2 things moment of inertia depends on?

Answer 7

The mass of the object and the distribution of the mass around the axis

Question 8

How does moment of inertia depend on the distribution of the mass around the axis?

Answer 8

The closer the mass is to the axis of rotation, the easier it is to turn - so the moment of inertia is low
Whereas, the further the mass is to the axis of rotation, the harder it is to turn – so the moment of inertia is high

Question 9

What will increasing the distance of the distribution of mass from the axis do?

Answer 9

It will increase the moment of inertia and decrease the angular velocity

Question 10

Is angular momentum constant?

Answer 10

It remains constant unless an external force acts upon it