TEST OF PRACTICAL KNOWLEDGE QUESTION You are... | WAEC SSCE - Physics - 2003

Question 1 Report

TEST OF PRACTICAL KNOWLEDGE QUESTION

You are provided with a metre rule, a knife edge, two pieces of thread and two masses m\(_{1}\) and m\(_{2}\)

Record the values of m\(_{1}\) and m\(_{2}\).
Balance the metre rule horizontally on the knife edge and record the balance point G.
With the knife edge at the 60 cm mark of the metre rule, suspend m\(_{1}\) at the 20 cm mark and m\(_{2}\) at a suitable mark such that the rule balances horizontally as illustrated in the diagram above.
Record the positions Y of m\(_{1}\) and Q of m\(_{2}\).
Evaluate 1= P - Y and d = Q - P
Repeat the procedure for four other positions of m, at 18, 16, 14 and 12 cm marks.
In each case, evaluate and record l and d.
Tabulate your readings.
Plot a graph of l on the vertical axis against d on the horizontal axis.
Determine the slope of the graph.
State two precautions taken to ensure accurate results.

(b}i. With the aid of a diagram, indicate the forces acting on the metre rule in the experimental set-up above.

ii. Define moment of a force about a point and state its S.1. unit.

Answer

TEST OF PRACTICAL KNOWLEDGE QUESTION You are provided with a metre rule, a knife edge, two pieces of thread and two masses m\(_{1}\) and m\(_{2}\) Record th...