physics

• Speed


  Distance and time
• Acceleration


  Change in speed and change in direction
• Velocity


  Speed and direction (distance, time and direction)
• Inertia


  A body either remains at rest or continues to move at a consistent velocity unless acted upon by a net external force
• Inertia


  • It's difficult to move something heavy but it is easy to move something light
• Force (F=ma)


  The vector sum of the external forces (f) on an object equal to the mass (m) of that object multiplied by the acceleration vector (a) of that object
• A body accelerates in the direction of the direction of the sum of the forces applied to it
• The mass of the object determines how much acceleration is felt
• Equal and opposite force pairs


  When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body
• Energy forms


  • Kinetic energy
  • Potential energy
  • Chemical energy
  • Thermal energy
  • Electrical energy
  • Radiant or electromagnetic energy
  • Nuclear energy
• Energy


  The ability to do work or cause change
• Energy does not have mass or take up space
• Energy is only visible through matter
• Kinetic energy


  Energy presently performing work
• Potential energy


  Stored energy, not presently performing work
• Mechanical energy


  • Kinetic mechanical: energy of motion of large objects
  • Potential mechanical: energy stored in large objects or a mass of particles (because of position)
• Chemical energy


  Energy stored in the bonds between atoms, such as ionic or covalent bonds
• Thermal energy


  Energy of vibrational motion in atoms and molecules, measured as temperature (above absolute zero)
• Most energy transformation processes eventually produce thermal energy as their final form
• Electrical energy


  Energy found in charged particles (protons (+) or electrons (-))
• Radiant or electromagnetic energy


  Only form that doesn't need matter to be transmitted, can only be kinetic
• Nuclear energy


  Energy stored in the nucleus of atoms released either in the nuclear fusion (fusing two nuclei into one nucleus) or fission (breaking one nucleus into two nucleus)
• The law of conservation states that energy cannot be destroyed but only transformed (converted) into different forms