Physics Classroom
The Physics Classroom: Newton's Laws: Double Trouble
Through the use of free-body diagrams and Newton's laws, students analyze the motion of two objects together.
Physics Classroom
The Physics Classroom: Vectors: Forces in Two Dimensions: Addition of Forces
In this tutorial, examine the effect of forces acting at angles to the horizontal, such that the force has an influence in two dimensions- horizontally and vertically.
Physics Classroom
The Physics Classroom: Vectors: Forces in Two Dimensions:equilibrium and Statics
Through examples and practice problems, this interactive tutorial helps students understand forces that are in a state of equilibrium with a net force of zero.
Other
Wikibooks: Physics Study Guide
A handy resource that gives an overview of equations and definitions pertinent to an introductory, college-level physics course, with two of its three sections focusing on motion-related topics and principles.
Physics Classroom
The Physics Classroom: Vectors: Double Trouble in 2 Dimensions
In this interactive tutorial, analyze two-body problems in which the objects are moving in different directions.