Students will learn the concepts of conservation of energy, kinetic and potential energy. They will also learn how to use photo gate sensors for data acquisition. In this challenge, students will set up an apparatus consisting of a ramp hinged at the edge of a track such that the angle of inclination can be varied. Using a smart timer and photo-gates, students will record the time taken for the ball to travel across the distance of track. Students will determine the angle of inclination for which the time of travel across the horizontal track will be least.
Project B: Extraction of caffeine from tea
Students will learn about caffeine which is a type of alkaloids. Caffeine is a stimulant found naturally in tea, coffee and kola nuts. Other examples of alkaloids include cocaine (a drug of abuse), strychnine (a poison), morphine (a pain killer), piperine (found in black pepper) and quinine (used to treat malaria and added to tonic). Clearly some alkaloids are beneficial and others extremely harmful. In this project, students will learn how to extract caffeine from different beverages.