3 13670.13 RRR Confidential Instructions Question 1 Requirements • Pendulum bob, string and split cork • Retort stand (height at least 75 cm) • Clamp and boss × 2 • Stopclock to 0.01 s • Metre rule • G clamp Preparation Clamp the retort stand to the desk using the G clamp. Tie the pendulum bob to the end of the string. Thread the pendulum string through the split cork. Position the split cork in the jaws of the clamp. Set the length of the pendulum to be 0.700 m. Position the second boss and clamp so that the rod of the clamp obstructs the path of the pendulum at a height of approx. 5 cm above the centre of mass of the bob as shown in the diagram in Fig 1.1. Fig 1.1 Place the stopclock and metre rule beside the pendulum Action at Changeover Ensure the length of the pendulum is 0.700 m, return the position of the rod to 5cm above the centre of mass of the bob. Zero stopclock. Table 0.05 m 0.700 m