Upthrust

• What is upthrust?

  Upthrust, also known as buoyant force, is the upward force exerted on an object submerged in a fluid, caused by the difference in pressure between the top and bottom of the object.
• Its what allows boats and other objects to stay afloat
• The amount of upthrust is dependant upon the density of the fluid and the volume of it. Higher density = Higher upthrust
• How does upthrust effect whether items stay afloat or sink?

  If the objects weight is equal or greater than upthrust it will stay up whereas if its lower than it will sink

  Density of object less than density of fluid then object stays afloat

  Density equal or more than it will sink

  This is due to the object not being able to generate enough upthrust to support its weight