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

New node

## Moment/Torque

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

M = F x D

Pivot/ Fulcrum/ Hinge

### Principle

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

## Levers

New node

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

New node, New node

## Center Of Gravity

### Regular Objects

Center of gravity is in the center of it

### Irregular Objects

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

### Concepts

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

## Stability

### Types of stability

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

### Redesign for stability

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