Problem: How does the length of pendulum affect its time of oscillations?

Aim: To study whether the length of pendulum will increase the time of oscillation.

Hypothesis: The longer the pendulum, the longer time taken for its oscillation.

Variables:

a) Manipulated variable: Length of pendulum

b) Responding variable: Time taken of oscillation

c) Constant variable: Weight of pendulum

Material and apparatus: Retort stand, string, pendulum, ruler, stopwatch.

Procedure:

1. Set up the apparatus shown like diagram 1. Adjust the pendulum length to 40 cm.

2. Pull the pendulum bob aside and release it. Start to count 20 complete oscillation.

3. Time is taken and record in table.

4. Repeat step 2 with length 60cm, 80 cm, and 100 cm.

Tabulation of data:

Interpreting data:

Conclusion: The longer the pendulum, the longer time taken for its oscillation.