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Torque and Angular Momentum
by emily esser
# Torque and Angular Momentum

## Torque

### Angular force

### Magnitude

### Point of Application

### not seperate from force

### measured by how effective a given force is at twisting or turning something

### Direction

## Concepts are the same as linear Kinematics

## PR. Solv. rotational Inertia

### If the object consists of a small number of particles calculate the sum

### For simple geometric shapes advance math be used, for simplier use table 8.1

### decompose object into several parts, find the sum of each, and then add them

### move mass parellel to the rotation axis without changing I

## Rotational Inertia

### depends on the location of the rotational axis

### Newton's Second Law for Rotations

## Spinning of torque

### Counterclockwise

### Clockwise

## Problem solving for Lever arms

### Draw a line parallel to the force through the force's point of application

### Draw a line from the rotation axis to the line of action

### the magnitude of the torque is the magnitude of the force times the lever arm

### Determine the algebraic sign of the torque as before

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Vector quality

Pushing perpendicularly gives a maximum torque

Pushing radially inward with same magnitude gives zero torque

Proportional to the perpendicular component will give it a lesser torque

Positive

negative