1. General Physics

2.  A motion that that is regular and repeating  Examples  Circular motion  Mass bouncing up and down on a spring  Pendulums

3.  motion that returns an object to its rest position  caused by a restoring force that is directly proportional to the objects displacement

4.  Bob:  the mass that at is hung on the end of a string that makes up the pendulum  measured in kg  Length:  Measured from point of attachment to center of bob in the rest position.  measured in meters

5.  Rest position:  Also known as the equilibrium position  Located at bottom of swing  Period:  the time for one complete cycle (forward and back to same position)  symbol: T  unit: seconds

6.  Frequency:  The number of complete cycles in a period of time  Symbol: f  Unit: 1/s or Hertz

7.  Amplitude:  The maximum displacement from the rest position.  Symbol: A  Unit: m  We will measure the amplitude of a pendulum by using a protractor to measure the degrees that the bob is pulled back from the rest position.

8. T=2 Π (l/g) 1/2

9. g = 4 Π 2 (length)/T 2