Friction is a force that always opposes motion. Force is measured in newtons (N). A force is a push or a pull. Contact forces arise between two objects which are in contact. Non-contact forces act ...

Introduction Have you ever seen a mobile? Not a mobile phone—but a hanging art sculpture? You might have had such a mobile in your room when you were little. These mobiles hang in the air and are ...

Tugging a small toy with your dog can be a lot of fun—but it’s also a great way to experiment with forces acting on an object. Forces are what scientists call the pushing and pulling on objects. In ...