1. Name ………………………………………………………. Date ………………….
Chapter 4: Scientific principles
Simple mechanical principles 1
You need to understand the principles behind some of the machines you will be using in
your profession. Answer the following questions about simple mechanical principles.
1 What is MA?
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2 What is a moment?
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3 Briefly explain the term ‘centre of gravity’.
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4 What is equilibrium?
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© Nelson Thornes Ltd 2012 1
Level 1
Worksheet 9

2. Name ………………………………………………………. Date ………………….
Chapter 4: Scientific principles
Principles of electricity 1
You will need to understand the basic principles, the simple units of electrical
measurement, and be able to carry out simple calculations. Familiarise yourself with
some of the key terms by finding the following words hidden in this word search.
electrical flow current power voltage ohm
resistance amperes watts conduct volts series
© Nelson Thornes Ltd 2012 2
Level 1
Worksheet 9