Newton’s laws and static equilibrium: measuring deltoid force in an arm lifting a load while wearing a heavy suit

Abstract We present our findings on the motion of the human arm in the context of physics education, focusing on measuring and calculating the deltoid force exerted by an arm when wearing a heavy suit, such as NASA’s spacesuit. Leveraging our understanding of human body mechanics and motion, we investigated this force using a 3D-printed arm model. The first goal of our research was to comprehend the mechanical impact of spacesuits on the human body, particularly the force required by the deltoid muscle to perform movements under increased weight and resistance. Simultaneously, we explored the use of a 3D printed arm model as an educational tool to enhance students’ understanding of torque and equilibrium. Our research has significantly impacted student learning by addressing a gap in demonstrations within human body-focused courses, leading to improved comprehension, increased classroom retention, and notable grade improvements, inspiring new educational tools and methods.