Newtons Laws to Angular Motion

Question 1

What is angular motion?

Answer 1

Angular motion is movement around a fixed point or axis

Question 2

When does angular motion occur?

Answer 2

Angular motion occurs when a force is applied outside the centre of mass- an off centre is called an eccentric force

Question 3

What are the axis you need to think about when talking about Angular motion

Answer 3

1. Transverse
2. Sagittal
3. Longitudinal

Question 4

What is Torque?

Answer 4

Torque is a rotational force which causes the body to rotate around an axis

Question 5

What is newtons law of angular motion with law of inertia?

Answer 5

-A rotating object will continue in its state of angular momentum until an external rotational force (torque) is applied to it

Question 6

Give an example of angular motion law of inertia

Answer 6

An ice skater will continue to rotate in the air until they land. Here the ground exerts an external force (torque) which changes their state of angular momentum. A decrease in angular velocity around their longitudinal axis

Question 7

What is newtons law of acceleration with angular motion?

Answer 7

The rate of change of angular momentum of an object is directly proportional to the rotational force (torque) acting on it

Question 8

Give an example of newtons law of angular motion?

Answer 8

The faster a diver throws their head and are forwards off a driving board, the greater. their angular velocity will be around their transversal axis.

Question 9

What is newtons law of action/reaction of angular motion?

Answer 9

For every rotational force applied there Is an equal and opposite rotational force exerted

Question 10

What is an example of newtons law of action/reaction of angular motion

Answer 10

When a diver throws their arms and head forwards and down, their legs will want to go backwards and up. This happens around the transversal axis.

Question 11

What is angular displacement ?

Answer 11

The smallest change in angle between the start and finish point (measured in radians)
-Radian = 57.3 degrees

Question 12

What is angular velocity?

Answer 12

the rotational speed of an object around the axis it is rotating

Question 13

What is angular acceleration?

Answer 13

The rate of change of angular velocity

Question 14

What is the equation for angular velocity?

Answer 14

Angular velocity= Angular displacement (rad)/Time take (s)

Question 15

What is the equation of angular acceleration?

Answer 15

Angular acceleration= Change in angular velocity (rad/s/ Time taken (s)