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Float and sink

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  • What force diagram shows floating ?
    Equal length arrows for gravity and upthrust
  • What happens when gravity is stronger than upthrust?
    The object sinks
  • Sate one factor that affects floating and sinking?
    Mass/ shape/ forces acting on the object
  • What does sinking mean?
    Going down to the bottom of the water
  • What happens if upthrust is greater than weight?
    The object floats
  • What is upthrust?
    Upthrust is the upward force from water
  • What happens when upthrust is equal to gravity?
    The object floats
  • Which force pushes objects up in water?
    upthrust
  • What shape helps objects float better?
    Wide and hollow shapes
  • Who discovered displacement?
    Archimedes
  • What is displacement?
    Displacement is when water is pushed a side by an object
  • What happens to upthrust when more water is displaced?
    Upthrust becomes stronger
  • What is a force diagram?
    A diagram that shows forces acting on an object
  • What are the two forces acting on an object in water?
    Gravity and upthrust
  • How does mass affect floating?
    More mass increases weight and may cause sinking
  • Why do ships float even though they are heavy?
    They displace a large amount of water
  • What does floating mean?
    Floating mean staying on the surface of water
  • How does shape affect floating ?
    Wide and hollow shapes float better
  • Does a heavier object always sink?
    No shape also matters
  • Does water push up on objects?
    Yes , with upthrust
  • What force pulls objects down?
    gravity
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