weight mass and gravity

• Gravitational Force

  • force of attraction between masses
  • on the surface of a planet it makes all things fall towards the ground
  • gives everything a weight
• Mass and weight are not the Same

  • Mass is just the amount Of stuff in an object. For any given object this will have the same value anywhere in the universe
  • Weight is the force acting on an object due to gravity
  • the weight of an object depends on the strength of the gravitational field at the location of the object.
• An object has the same mass wherever it is but its weight will be different. A 1kg mass will weigh less on the moon (about 1.6N) than it does on earth (about 9.8 N) because the gravitational feild strength on the moon is less
• weight is a force measured in newtons. you can think of the force as acting from a single point in the object, called the centre of mass
• weight is measured using a newtonmeter
• Mass is measured with a mass balance or weighing scales
• Weight (N)= Mass (Kg) x Gravitational feild strength (N/KG)