The Physics Classroom: Newton's Laws: Balanced and Unbalanced Forces

Through the use of free-body diagrams and Newton's laws, students analyze the motion of two objects together.

Students are give the opportunity to practice some action-reaction pair problems. Each example is self-checking for on-the-spot reinforcement.

A four-lesson e-textbook covering topics in Newton's Laws. Tutorials include informational text,animations, interactive activities, and quick, interactive comprehension checks throughout the lessons.

Have you ever felt that queasy feeling in a moving elevator? Explore the physics behind the sensations of weightlessness and weightiness. Teacher notes and a downloadable handout are also provided.

Use this outline to find out about Newton's Laws of Motion. Use the different lesson plans covering the laws of motion to learn more.

Online classroom site explaining the concept of balanced and unbalanced forces. The site has examples and exercises for the student to review and try.

Video lesson serves as a primer on identifying balanced and unbalanced forces. [8:11]

Through illustrated examples and interactive practice problems, students find the value of forces acting upon objects using force equations.

States the equation of Newton's law of universal gravitation. States the value of G and uses the equation to solve problems.

Experience the effect of friction, air resistance, and applied force upon a sledder. The speed, acceleration, and force values are displayed as the sled moves. Learners can vary the mass of the sledder and the size of the parachute...