[Paper Review] Addressing learning difficulties in Newtons 1st and 3rd Laws through problem based inquiry using Easy Java Simulation

Khoon Song Aloysius Goh, Loo Kang Wee+3 more|arXiv (Cornell University)|Mar 1, 2013

Teaching and Learning Programming4 citations

TL;DR

This study develops an Easy Java Simulation (EJS) model to address learning difficulties in Newton's 1st and 3rd Laws using a problem-based inquiry (PbI) approach. The simulation uses frictionless motion and spring collision models to visualize forces and motion, showing significant post-test gains in understanding Newton's 1st Law (p < 0.05) but not for the 3rd Law, with students reporting better conceptual insight into the 1st Law through dynamic visualization.

ABSTRACT

We develop an Easy Java Simulation (EJS) model for students to visualize Newtons 1st and 3rd laws, using frictionless constant motion equation and a spring collision equation during impact. Using Physics by Inquiry instructional (PbI) strategy, the simulation and its problem based inquiry worksheet aim to enhance learning of these two Newtonian concepts. We report results from Experimental (N=62 students) and Control (N=67) Groups in 11 multiple choice questions pre and post tests, conducted by three teachers in the school. Results suggest, at 95 percent confidence level, significant improvement for concept of Newtons 1st Law while not so for Newtons 3rd Law. A Focus Group Discussion revealed students confirming the usefulness of the EJS model in visualizing the 1st Law while not so much for the 3rd Law. We speculate the design ideas for constant velocity motion in the computer model coupled with the PbI worksheet did allow for making sense and experiencing of the 1st Law, where traditional pen-paper representations could not. We have improved the features for the action-reaction contact forces visualization associated with the 3rd Law and we hope other teachers will find the simulation useful for their classes and further customize them to benefit all mankind, becoming citizens for the world.

Motivation & Objective

• To address persistent student misconceptions about Newton's 1st and 3rd Laws in introductory physics.
• To design an interactive simulation using Easy Java Simulation (EJS) that visualizes key dynamics concepts, particularly constant velocity motion and action-reaction force pairs.
• To implement and evaluate a problem-based inquiry (PbI) instructional strategy integrated with the EJS simulation in real classroom settings.
• To assess the effectiveness of the simulation and PbI worksheet in improving conceptual understanding through pre- and post-testing.
• To identify design features that enhance learning for each law, based on student feedback and performance data.

Proposed method

• Development of an Easy Java Simulation (EJS) model using equations for frictionless constant velocity motion and spring-based collision dynamics.
• Integration of the EJS simulation with a problem-based inquiry (PbI) worksheet to guide student exploration and conceptual construction.
• Implementation of the intervention in real classrooms across three teachers’ sections, with experimental (N=62) and control (N=67) groups.
• Administration of 11-question multiple-choice pre- and post-tests to measure conceptual understanding of Newton’s 1st and 3rd Laws.
• Conduct of focus group discussions to gather qualitative feedback on the perceived usefulness of the simulation for visualizing each law.
• Use of statistical analysis at the 95% confidence level to compare pre- and post-test performance between groups.

Experimental results

Research questions

• RQ1 Does the use of an EJS simulation with a PbI worksheet significantly improve students’ understanding of Newton’s 1st Law compared to traditional instruction?
• RQ2 To what extent does the same intervention improve understanding of Newton’s 3rd Law?
• RQ3 How do students perceive the usefulness of the EJS simulation in visualizing the forces and motion involved in Newton’s 1st and 3rd Laws?
• RQ4 What design features of the simulation most effectively support conceptual engagement with Newton’s 1st Law?
• RQ5 Why does the simulation show stronger learning gains for Newton’s 1st Law than for the 3rd Law, based on student feedback and performance?

Key findings

• Students in the experimental group showed a statistically significant improvement in understanding Newton’s 1st Law at the 95% confidence level, as measured by post-test scores.
• No statistically significant improvement was observed for Newton’s 3rd Law in the experimental group compared to the control group.
• Focus group discussions revealed that students found the EJS simulation particularly helpful in visualizing the 1st Law, especially the concept of inertia in constant velocity motion.
• Students reported limited benefit from the simulation in understanding the 3rd Law, suggesting challenges in visualizing action-reaction force pairs in dynamic collisions.
• The design of the simulation—particularly the clear visualization of constant velocity motion—was identified as a key factor enabling deeper conceptual engagement with Newton’s 1st Law.
• The authors suggest that the 3rd Law’s complexity, especially in force pair timing and direction, may require enhanced visualization features, which they have begun to improve.