THE DESIGN OF TEACHING AIDS IN LONGITUDINAL WAVES PROPAGATION ON A SLINKY BY USING VIDEO TRACKING ANALYSIS

• Main Author: Ratnaningsih, Faridah
• Format: Theses
• Language: Indonesia
• Subjects: Fisika
• Online Access: https://digilib.itb.ac.id/gdl/view/39844
• Institution: Institut Teknologi Bandung

Longitudinal wave propagation is one of the most difficult topics learned in the high school. It is helpful to find a proper teaching aid to make the students understand about this topic. The teaching aid should be made by simple parts that can be found in the physics lab or our environment. Audio generator and vibrator are needed to make an oscillation. The oscillation is propagated through a slinky which have specific characteristics. The wave propagation is being recorded by a camera of 25 frames per second. This recording is analyzed by using a video tracker software. The data from this video tracker are used to determine the wave quantities and wave parameters. This quantities in longitudinal waves could not be determined directly. The experiments use some different frequencies and slinky. This teaching aid can be used in the second experiment. In this experiment, two slinky with different spring constants are combined together. The audio generator are used as a wave source that propagate through both slinkies. The propagation through the boundary of both slinkies are then observed. The results show that the propagation is easier to be observed when the source come from slinky with bigger spring constant. And the reflected wave is easier to be observed when the wave source come from slinky with smaller spring constant. Waves transfers energy when propagates through medium such as slinky. The magnitude of energy propagates through slinky can be determined by measuring the force exerts on the end of the instrument. The circuit contains of load cell HX711 and arduino nano are places at the end of this instrument. The measuring result can be read in the personal computer (pc) or in the laptop.