B.2.2, 2.3, 2.4 - mechanical, potential, kinetic energy

• Gravitational potential energy - potential for work depending on object’s position relative to Earth’s surface
• Kinetic energy - ability for work depending on object’s velocity and mass
• Mechanical energy = potential + kinetic
• • Law of conservation of energy - total energy in system can’t be changed (energy can’t be destroyed) 
• Energy systems

  • Open - mass and energy can pass through
  • Closed - energy can pass through
  • Isolated - mass and energy can't pass through (theoretical, all systems exchange energy)