# Introduction to Vectors and Scalars

Key concepts in the study of mechanics and motion are vectors and scalars. This overview gives an introduction to both, with examples and links for learning more. Continue reading

# Universal Gravitation

Newton’s Law of Universal Gravitation says the force between any two bodies is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them. Use this Formula Solver to learn more. Continue reading

# Free-Falling Objects

An object at rest, dropped from a distance above the Earth, will accelerate downward at a constant rate due to gravity. Learn with this Formula Solver how to calculate this downward acceleration using your own distance, time, and final velocity values. Continue reading

# Speed and Velocity

Speed is a scalar quantity measuring distance travelled over time, while velocity is a vector quantity measuring displacement over time. This Tab-Tutor Series program will help you learn how to calculate them both — check out the glossary review, too! Continue reading

# Displacement and Distance

Displacement is a vector quantity having both magnitude and direction, while distance is a scalar quantity having only magnitude. This Tab-Tutor Series program will help you learn how to calculate them both — check out the glossary review, too! Continue reading

# Constant Acceleration

The relationship between constant acceleration, time, velocity, and distance is a key physics concept. Learn how to calculate constant acceleration with this Formula Solver. Continue reading