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Physics Chap 5-
Turning Effects
of Forces
by Erika Rugde
# Physics Chap 5-
Turning Effects
of Forces

## Terms

### Equilibrium

### Clockwise Motion

### Anti-clockwise Motion

### Center Of Gravity

### Line Of Action

## Moment/Torque

### Turning Effect of A Force

### Moment = Force x perpendicular dist. from the pivot

### SI unit = Newton Metre (Nm)

### Principle

## Levers

### Enable us to move object with less force

### A rod- when force is applied on
it, it will help move load

### Has a pivot

## Center Of Gravity

### Point where gravity acts on an object

### If the LoA of the object doesn't go through the
pivot, there is a moment (it turns)

### Regular Objects

### Irregular Objects

### Concepts

## Stability

### The measure of a body's ability to maintain its position

### Types of stability

### Redesign for stability

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New node

M = F x D

Pivot/ Fulcrum/ Hinge

When an object is in equilibrium, the ∑ cwm = ∑ acwm

New node

New node, New node

Center of gravity is in the center of it

1) set up apparatus

2) Hang plumbline in front of laminar

3) Trace the plumbline to laminar

4) Turn the laminar and trace the other edge

The intersection of the lines is the Center of Gravity

http://www.youtube.com/watch?v=R8wKV0UQtlo&feature=related

Objects will turn till it reaches a point where there is no moment

If object is hung freely it will always come to rest with its Center of Gravity directly below the Pivot

Stable Equilibrium, Displaced slightly and it is able to maintain its position

Unstable Equilibrium, Displaced slightly and it changes its position, Always try to find a lower Center of Gravity

Neutral Equilibrium, Remains still after being Displaced

Lower the Center of Gravity, Increase weight, Change Material, Change to heavier material

Increase Base Area, Change Pivot, Chnage Center of Gravity, Change both

Move Center of Gravity Lower than Pivot

Center of Gravity below PIvot