mass, weight and density

• mass is a measure of a quantity of matter in an object at rest relative to the observer
• mass: is constant regardless a location

  resist change from its state of rest or motion(inertia)

  scaler quantity

  SI unit: kg

  compared using beam balance or equal-arm balance
• weight is the pull of gravity on the body
• weight: the weight is different at the equator at north pole and south pole

  is a vector quantity

  SI unit: Newton

  apparatus-force meter

  compared weight using beam balance or equal-arm balance
• density of the body is its mass pure unit volume
• the gravitational field is a region in which a mass experiences a force of gravity
• the garvitational field strenght is define as gravitational force acting per unit mass on an object
• Mass= density × volume

  Density= mass /volume

  Volume= L×w×h