This University of Minnesota site provides a series of contextually rich, real-world problems demonstrating force and Newton's second law of motion.

Forces are responsible for all the interactions between particles and objects. They can be put into two categories: contact forces and non-contact forces. Forces can be added up as vectors.

Wikipedia's site on centripetal force provides a section explaining the difference between centripetal force and centrifugal force. Includes formulas and hyperlinked terms.

[Free Registration/Login Required] Shown are three different systems with two forces acting upon it and a red vector showing the net force acting upon the system. Move the red dots to accurately reflect the net force experienced by each...

The process of finding the magnitudes of the components of a force, called resolving the force, is explained at this site.

This informative tutorial on Coulomb's Law and electric force in physics features a definition as well as formulas, diagrams, and learning exercises.

In this physics tutorial, the task of summing vectors will be extended to cases in which the vectors are directed in directions other than purely vertical and horizontal.

This physics tutorial illustrates problems that show the vector sum of two or more vectors is the resultant.

Applying the forces of wind and/or gravity to a particle system so that the system can apply force to all individual particles. In addition, adding a repeller where all the force vectors have a different direction is illustrated.

This illustrated tutorial discusses the horizontal and vertical components of a projectile's motion; specific attention will be given to the presence/absence of forces, accelerations, and velocity.

This lesson demonstrates how to draw free-body diagrams for objects at rest or sliding on an inclined plane. It is 2 of 2 in the series titled "Representing Forces on an Inclined Plane."

[Free Registration/Login may be required to access all resource tools.] Definition of force, how it relates to motion, and force as a vector.

Background information on vectors and their use in describing motion in two dimensions. A comparison of Aristotle's and Galileo's perspectives on force and motion is given.

This physics tutorial provides students illustrated examples and interactive practice problems containing perpendicular components of motion.

By participating in a group activity, students will learn how to add force vectors. They will see the significance of direction when adding vector quantities.

In this interactive tutorial, analyze two-body problems in which the objects are moving in different directions.

Through illustrated examples and interactive practice problems, students explore problems that involve relative velocity- where the actual motion of an object is different than its motion relative to a stationary observer.

The goal of this activity is to get students to think about what is happening when velocity and acceleration vectors point in different directions. The pictures, sentences, and cars used allow the students to picture each situation in...

This resource presents information about the mathematical model of forces on bridges. Examples of a classroom activity are provided. The resource also involves using matrices to solve systems of equations.

A short interactive activity which allows you to calculate the sum of two component vectors.

This University of Minnesota site provides a series of contextually rich problems pertaining to force, Newton's second law of motion, and linear kinematics.

[Free Registration/Login Required] Learn about adding force vectors in two dimensions using the example of a painting hanging from two strings. Experiment with variables of weight and angles to hang a portrait in this physics simulation....

[Free Registration/Login Required] Learn about adding two vectors together by components in the context of a GPS-style city map. Adjust magnitude and angles in the two vectors to simulate the driverless car. Examples taking this concept...

A detailed explanation of the different types of forces that can be applied to an object and how to represent them in a free body diagram. Includes examples and some practice problems to try, with solutions provided.