A simple pendulum is defined as an object that has a small mass which is suspended from a wire or string of negligible mass.  The gravitational acceleration can be determined using the oscillation period.

Equipment list:

• Ring and aluminum holder
• A-shaped cast iron stand with three adjustment screws to level the apparatus
• A rod in 1 m length
• Scaled protractor made of plexiglass, ±90⁰
• Adjustment screw to adjust the height of the thread and one extra screw(metallic-plexy)
• Thread and two bullets made of different materials
• Bench digital chronometer and counter
• One optical sensor
• One rod in 20cm lenght to hold optical sensor
• One meter in 3 m length