スマートフォンを用いた物理実験

（力学台車を用いた衝突実験）

抄録

Smartphones are one of the most convenient tools, and applying them to physics experiments can be expected to improve educational effects. In this research, we attempted to utilize a system that connects an ultrasonic sensor and a smartphone to measure the position and behavior of objects in real time. We focused on the collision of two objects. Two methods of contact between two objects, a method using a spring and a method using clay, were conducted. People can experience how the law of conservation of momentum and the law of conservation of mechanical energy change depending on the contact method. It is expected that this will enable us to understand the phenomenon clearly.