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%.
The average annual salary in the UK today is around Â£26,000, for working a 40 hour week. In 1910 it was around Â£70 for men and Â£30 for women (the equivalent of Â£6,500 and Â£2,800 today) for working a 55 hour week.