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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

What will happen if the centre of gravity is outside object

It will topple over