Centripetal and centrifugal forces are central to circular motion, but they're not the same. Discover the differences between ...

Why is pancake syrup an example of a resistive force? Some forces are called contact forces because they require objects to touch. One is tension force, found in stretched wires. Another is the force ...

Gravity is the force of action between two objects. It’s called a natural force because it acts at a distance rather than needing to be in contact. Gravity is the force that holds us down on Earth and ...

This series of short explainer films with Professor Brian Cox comprises six clips focused on forces, speed and motion. Each ...

To break symmetry, all cells polarize making one part of the cell structurally, functionally, or computationally different than another. Polarization requires a complex arrangement of active processes ...

Dedication; Foreword; Preface; Acknowledgments; About the Authors; Introduction; Section 1-Describing Motion and Position; Probe 1-How Far Did It Go?; Probe 2-Skate Park; Probe 3-Following Jack: Part ...