Question 1a

You are provided with a pendulum bob, a string, a metre rule, retort stand with two clamps, a stop-watch and other necessary materials

1. Set-up a simple pendulum of length, H = 120 cm.
2. Fix the second clamp on the retort stand to serve as a horizontal stopper, such that the clamp is just in contact with the pendulum string in the equilibrium position as illustrated in the diagram above.
3. Adjust and record the position of the stopper such that y = 20 cm and L = 100 cm.
4. Set the pendulum in motion in a plane at right angles to the stopper such that at each return the string makes contact with the stopper.
5. Measure and record the time t for 20 oscillations.
6. Determine the period T.
7. Evaluate , , X = (  + )
8. Keeping H constant, repeat the procedure for four other values of L = 90 cm,

80 cm, 70 cm and 60 cm.

1. Tabulate your readings.
2. Plot a graph with T on the vertical axis and X on the horizontal axis.
3. Determine the slope, s, of the graph.
4. Evaluate g  =(  )2, where л = 3.14
5. State two precautions taken to obtain accurate results.