PHYSICS LAB MANUALS

Kater's Pendulum

  1. Balance the pendulum bar on the sharp wedge with the knife edge at its center of mass.
  2. After ensuring that the pendulum is optimally balanced on the sharp wedge at the center of mass, put the knife edge at the extreme position of the pendulum

  3. Displace the pendulum to one side keeping it parallel to the wall, and release
  4. Let the pendulum perform 2-5 oscillations and come to steady state, then note the time for 20 oscillations (one oscillation is made when the pendulum reaches the same extreme point from where you released it).
  5. Repeat the experiment and note your observation for each position on either side of center of mass.
  6. Find the positions for which the time period matches and note them separately.

Two physical quantities need to be measured in this experiment – Length and time (period). Make the following table –

Table II : The details of the physical quantities to be measured
Sl No.Physical Quantityindependent/dependentmeasured withMeasuring instruments
minumummaximumleast count
1Length
2Time