Ex) Article Title, Author, Keywords
New Physics: Sae Mulli 2007; 54: 519-525
Published online June 30, 2007
Copyright © New Physics: Sae Mulli.
Jaewoo KIM1,* Wonkun OH2
Most current 7th-grade science textbooks explain that spring scales can be used for measuring weight only, not mass. However, spring scales can also be used to measure the gravitational mass of a body. Moreover, a simple spring oscillator can be used to measure the inertial mass in a weightless situation. Here, we suggest that such a measurement can give an alternative way of operationally de?ning ‘mass’ We took 123 students of 7th grade as subjects. They were made to measure the mass by using spring scales and spring oscillators. From the analysis of their performances, we were able to conclude that the new operational de?nitions of mass have enough reliability and accuracy for young students. These new de?nitions can help overcome the logical de?ciency of textbooks' explanations and help students understand the concept of inertial mass.
Keywords: Textbook, Concept of mass and weight, Gravitational mass, Inertial mass