Resumen de Smartphone-based measurement of magnetic force and demonstration of Newton’s third law of motion

Sanjoy Kumar Pal, Soumen Sarkar, Pradipta Panchadhyayee

• A fascinating approach to teaching Newton’s third law using readily available technology is presented in this article. Magnetic forces are measured by using a smartphone’s pressure sensor, two ring magnets, and common household items. Students can measure the magnitudes of forces, gain a more tangible understanding of the law, and see how “action” and “reaction” are quantitatively equal and opposite.