Imagine you are provided with a clamp and stand, piece of twine 90cm long, A micrometer screw guage, a meter rule, a stop You will be required to make the pendulum and record it's length

Securely attach the clamp to a stable surface and position the stand vertically.

Take the 90cm piece of twine. Tie one end of the twine to the clamp, ensuring it hangs freely. For a functional pendulum, you would typically attach a small mass (a bob) to the other end of the twine.

Using the meter rule, measure the distance from the point where the twine is clamped (the point of suspension) down to the center of the bob (if a bob is used). If no bob is used, measure to the free end of the hanging twine. This measured distance is the length of the pendulum.

Note down the measured length in centimeters (cm). For example, if you use 80 cm of the twine and attach a bob, the length might be 80.0 cm.