# What Two Forces Determine Whether an Object Floats or Sinks?

The two forces used to determine whether an object floats or sinks in a fluid are the force of gravity and the force of buoyancy. The force of gravity pulls the object towards the Earth, while the force of buoyancy attempts to push the object towards the top of the fluid. An object will float if its density is less than the fluid in which it is placed.
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Q&A Related to "What Two Forces Determine Whether an Object..."
 The density of the object and the density of the fluid you drop it into. http://wiki.answers.com/Q/What_two_forces_determin...
 As determined thousands of years ago by the Greek scientist Archimedes, an object will float if the weight of the object is less than the weight of the water which it displaces. http://wiki.answers.com/Q/What_determines_whether_...
 To sink in water, an item must be denser than the water. http://wiki.answers.com/Q/What_determines_whether_...
 Specific gravity is one , surface tension is another this is what will allow a needle to float on water. http://wiki.answers.com/Q/What+determines+whether+...
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