phys chap3

• mass definition

  A measure of the amount of substance in a body
• Weight definition 


  The amount of force the Earth is pulling on its
• Gravitational field


  Region where mass experiences a pulling force due to gravitational attraction
• Density


  Mass per unit volume
• Pressure


  Force per unit area
• Equation for Determining Weight

  W = mg
• pressure formula

  P = F/A
• gravitational field formula

  g = w/m
• density formula

  P = m/v