1. Fix the 100g mass marked P at B, the 80 cm mark of the uniform metre rule, using an adhesive.
2. Suspend another 100g mass marked Q at A, a distance V = 10.Ocm from the 0 cm mark of the metre rule.
3. Balance the whole arrangement horizontally on a knife edge as shown in the diagram above.
4. Measure and record the distance U of K from the 0 cm mark of the metre rule.
5. Repeat the procedure for five other values of V = 15.0, 20.0, 25.0, 30.0 and 35.0 cm
6. In each case, measure and record the Corresponding values of U. Tabulate your readings.
7. Plot a graph of U on the vertical axis against V on the horizontal axis.
8. determine the:
   (1) slope, s, of the graph
   (2) intercept c, on the vertical axis.
9. Evaluate (i) K\(_{1}\) =\(\frac{(1 - 2s)}{s}\) 100:
                 (ii) K\(_{2}\) = \(\frac{2c}{s}\) - 160
10. State two precautions taken to ensure an accurate result

(b)i. State two conditions under which a rigid body at rest remains in equilibrium when acted upon by three non-parallel coplanar forces.

ii. Explain how the position of the centre or gravity of a body affects the equilibrium of the body.