Science mass and weight quiz

==MIGHT NOT NEED TO KNOW==

^^IMPORTANT^^

FORMULAS/CONVERSIONS

  • ^^m=w/g^^
  • ^^w=mg^^
  • ^^g=w/m^^
  • ^^1lb=4.5N^^
  • ^^1kg=2.2lb^^
  • ^^Earths gravity=9.8N/kg^^

MEASUREMENTS

  • weight-newtons
  • mass-kilograms
  • gravity-N/kg

DEFINITIONS

  • weight: the force of gravity on an object
  • force: a push or a pull, any action that has the ability to change motion
  • mass: the amount of matter in an object
  • ==nuclear force: force that holds the nucleus of an atom together; strong force but it reaches a short distance==
  • ==electromagnetic force: force that acts between positive and negative charges; holds atoms together into molecules==
  • ==weak force: causes some kinds of radioactivity==
  • gravity: force that causes all masses to attract to one another; your weight come from the mass of the earth attracting the mass of your body
  • pounds: the common unit of force used in the US
  • newtons: the metric unit of force; also known as the amount of force that can change the motion of an object

WAYS FORCES ARE CREATED

  • muscle movement
  • gravity
  • moving matter

THE FOUR ELEMENTARY FORCES

  • nuclear force
  • electromagnetic force
  • weak force
  • gravity

OTHER INFO

  • an objects mass does not change from planet to planet
  • objects have more gravity because they have more mass
  • mass is not affected by gravity