As the long as the forces are not unbalanced - that is, as long as the forces are balanced - the first law of motion applies. This concept of a balanced versus and unbalanced force will be discussed in more detail later in Lesson 1.
The average weekly wage in Wales in April this year was Â£506.4 â equivalent to Â£26,332 a year. The average UK salary was Â£587.30, or Â£30,539 a year. Workers in Wales took home on average 1.7% more between 2008 and 2009 while salaries paid across the UK grew by 2%.
In 1968 the average salary of men teachers in maintained schools in England and Wales was Â£1,646. I estimate that the last two pay settlements have raised this figure to about Â£1,880. The comparable figure at 31st March, 1963, was Â£1,244.