Smartphone-based measurement of magnetic force and demonstration of Newton third law of motion

2026/05/02 by Sanjoy Kumar Pal, Soumen Sarkar, Pradipta Panchadhyayee · 1 voice · 3 citations
Physics and Astronomy · #physics.ed-ph

paper · pdf · doi:10.1119/5.0206524

Abstract

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.

Cited by

• Determining Viscosity of a Liquid with Smartphone Sensors: A Classroom-Friendly Approach Using Damped Oscillations
• Use of smartphone as a density measuring device
• Demonstration of magnetic dipole-dipole interaction by using smartphone pressure sensor

Discussions

• Sanjoy Kumar Pal, Soumen Sarkar, Pradipta Panchadhyayee: Smartphone-based measurement of magnetic force and demonstration of Newton third law of motion https://arxiv.org/abs/2605.01554 https://arxiv.o [bsky, 0 points, 0 comments]

Related

• Magnetic Field Experiments Using a Phone
• Demonstration of magnetic dipole-dipole interaction by using smartphone pressure sensor
• The Circular Atwood Machine
• Combining Physics and Mathematics Learning: A Taylor Series Analysis of an Oscillating Magnetic Field
• Promoting the Joy of Learning by Turning a Smartphone into Scientific Equipment