Using the diagram above as a guide, carry out the following instructions.

1. Place the meter rule provided on the knife edge and adjust the position until it balances horizontally.
2. Read and record the balance point, G. Keep the knife edge at this point throughout the experiment.
3. Suspend a mass Q= 50.0g at a point P 30cm from the 0cm end of the rule.
4. On the other side of G, suspend the mass M =30g. Adjust its position until the rule settles down horizontally as shown in the diagram above.
5. Read and record the position R of M.
6. Record the distance, d, between G and R. Also read and record the distance, a, between P and G.
7.  Repeat the procedure for four other values of M = 40, 50, 60, and 70 with Q kept in the same position. Evaluate d\(^{-1}\) in each case. Tabulate your readings.
8. Plot a graph of M on the vertical axis against d\(^{-1}\) on the horizontal axis.
9. Determine the slope,s, of the graph.
10. Evaluate k = \(\frac{s}{Q}\)
11. State two precautions taken to ensure accurate results.

(b)i. Explain the moment of a force about a point

ii. State the conditions necessary for a body to be in equilibrium when acted upon by a number of parallel end forces