Flashcards in Applications Of Energy Deck (11):

1

## State hookes law

### Extension is proportional to the load, provided the proportional limit is not exceeded

2

## Formula for hookes law

###
F = kXe

F- applied force

K- spring constant

E- extension

3

## Hookes law graph

###
X axis - extension

Y axis - force

4

## Pressure

###
Pressure force excerpted per m2

Measured in Pa (pascal)

1 Pa = 1 N/m2

F

—

5

## Why do sharp knifes have small blade?

### Creates larger pressure, makes cutting easier

6

## Why is caterpillar tracks on vehicles useful?

### Weight acts over a large area, so reducing the pressure they except on the ground

7

## Moment formula

### Moment = f X d

8

## Principle of moments

###
When a body is in equilibrium, the sum of the clockwise moments about any point equals the sum of the anti-clockwise moments about the same point.

ACM = CM

9

## Centre of gravity

### Point where all of the weight of the object can be considered as acting

10

## Where is the centre of gravity in a stable object

### Low centre of gravity and a wide base

11