energy

• energy cannot be created or destroyed
• kinetic is the energy in a moving object
• kinetic = o.5 x mass x speed squared
• gravitational is the energy in a object above ground
• gravitational = gpe = mass x gravitational field strength x height.
• in gravitational, the higher up the object, the higher the energy
• thermal energy causes kinetic energy to increase
• when kinetic energy is increased, particles vibrate more and move faster
• thermal = mass x specific heat cap x temperature change
• if substance A had a specific heat capacity 2x bigger than substance B, what substances temperature increases faster?

  B, because the higher the specific heat capacity, the longer it will take since it needs the most energy.
• how can you stop wasted energy lost by friction?


  make the surfaces smoother