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Concept Library

Study Concepts

Search and filter clear explanations across everything we teach — reading, math, physics, study skills, and hands-on outdoor and kitchen projects.

Showing 5 concepts in Physics.

PhysicsMechanics

Kinematics Equations

A set of equations relating displacement, velocity, acceleration, and time for motion with constant acceleration.

motionvelocityaccelerationconstant acceleration
PhysicsMechanics

Newton’s Second Law

The net force on an object equals its mass times its acceleration.

forcemassaccelerationF=ma
PhysicsEnergy

Work and Kinetic Energy

Work is force applied over a distance; kinetic energy is the energy of motion. Net work changes an object’s kinetic energy.

workenergyjouleskinetic energy
PhysicsMechanics

Momentum and Conservation

Momentum is mass in motion. In a closed system, total momentum stays the same before and after a collision.

momentumcollisionsconservation
PhysicsElectricity

Ohm’s Law

The voltage across a resistor equals the current through it times its resistance.

voltagecurrentresistancecircuits