Texas Education Agency
Texas Gateway: 4.3 Newton's Second Law of Motion: Concept of a System
By the end of this section, you will be able to define net force, external force, and system; understand Newton's second law of motion; and apply Newton's second law to determine the weight of an object.
Georgia State University
Georgia State University: Hyper Physics: Conservation of Energy
This site is from the Physics Department at Georgia State University. The conservation of energy as a fundamental conservation law is presented and compared to other conservation laws (momentum and angular momentum). Links to further...
Georgia State University
Georgia State University: Hyper Physics: Energy of Falling Object
This site is from the Physics Department at Georgia State University. The reliance upon the law of conservation of energy as an approach to problem-solving is presented and encouraged. It is modeled through a problem involving a...
Physics Classroom
The Physics Classroom: Work, Energy, and Power: Mechanical Energy Is Conserved
In this interactive exercise, explore the quantitative relationship between work and mechanical energy in situations in which there are no external forces doing work.
Texas Education Agency
Texas Gateway: 4.1 Development of Force Concept
By the end of this section, you will be able to understand the definition of force.
Concord Consortium
Concord Consortium: Molecular Workbench: Crack Propagation & Fracture
Cut various sections of a substance in this simulation to observe how the substance will crack and fracture at a molecular level.