<P> For this reason , an object whose density is greater than that of the fluid in which it is submerged tends to sink . If the object is either less dense than the liquid or is shaped appropriately ( as in a boat ) , the force can keep the object afloat . This can occur only in a non-inertial reference frame , which either has a gravitational field or is accelerating due to a force other than gravity defining a `` downward '' direction . In a situation of fluid statics , the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body . </P>
<P> For this reason , an object whose density is greater than that of the fluid in which it is submerged tends to sink . If the object is either less dense than the liquid or is shaped appropriately ( as in a boat ) , the force can keep the object afloat . This can occur only in a non-inertial reference frame , which either has a gravitational field or is accelerating due to a force other than gravity defining a `` downward '' direction . In a situation of fluid statics , the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body . </P>
what is the name of the force that keeps things afloat
what is the name of the force that keeps things afloat
buoyancy
buoyancy