A large mass on a stretched spring is tared on a pan balance. The string is burned and the motion observed.
The set up for the demonstration. You will need 3.5 kg to put in bucket to balance.
How to attach string to platform.
Observe balance begin to oscillate.
Location: pendulum clamp FG-6, rod stand (aisle F), metal sheet for platform F3-4, spring F4-3, masses FG-7, pan balance with bucket G2-5, string DE-4, propane torch (workroom)