1.Base; 2.Scale plate 3.Releaser; 4.Absorber 5.Light Blocking Sheet; 6.Standing support; 8.data processing and communication circuit with USB port; 9.Pendulum bob (7. Photo Gate and weight ); 10.Pendulum Rod. 

1. Main Board, 2.Subboard, 3.Fixed Arm for Photogate, 4.Fixed Arm with magnetic clamp, 5.Pendulum Bob (include cord), 6.Position Stop, 7.Planometer, 8.Central Nut, 9.Central Bolt, 10.Fixed Bolt for Pendulum Line, 11.Butterfly Bolt, 12.General Bolt

Components: A. Base, B. L-type Rotating Arm, C. Angle Scale, D. Build-in Force Sensors —one in the long arm and the other in the short, E. T-type Rollers assembled on the top of force sensors , F. Cable Port for connection with data logger, H. Plastic ring used as a measured object

Components: A. Cotton Thread, B. Switch, C. Base, D. Fixed Rod, E. Friction Layer, F. Friction Block.