Physics year 8

• What is Energy?


  The ability to do work or cause change
• What is a Contact Force?


  A force that requires physical contact between objects
• What is a Non-Contact Force?


  A force that doesn't require physical contact between objects
• Friction


  A type of Contact Force that occurs when two surfaces rub against each other
• Gravity


  A type of Non-Contact Force that pulls objects towards each other
• Tension


  A force exerted by a stretched or compressed material
• Force


  A generalized energy transferred or exerted upon an object
• Pressure Equation


  P = F/A
• Work Done Equation


  W = F × d
• Weight Force


  W = mg
• Moment Equation


  M = F × r
• Data Point


  A single piece of data plotted on a graph