4+FORCE+AND+MOMENTS


 * Introduction**


 * Chapter 4**
 * FORCE AND MOMENTS**

At the end of this chapter, you should be able to:
 * 1) predict and explain the effect of a force on the size and shape of a body;
 * 2) describe the ways in which a force may change the motion of a body;
 * 3) show an understanding of how force is measured by the extension and compression of springs;
 * 4) describe the effects of friction on the motion of a body;
 * 5) recognise the use of lubricants, ball bearings, rollers and wheels for reducing friction in practical applications;
 * 6) describe the moment of a force using the formula : moment of a force about a point = force x perdendicular distance from the point; and
 * 7) make simple calculations involving the principle of moments (with force diagrams given)