When an object floats, the forces of weight and upthrust are balanced.

Here's why:

* Weight: This is the force of gravity pulling the object downwards.

* Upthrust (Buoyancy): This is the upward force exerted by the fluid (liquid or gas) on the object.

For an object to float:

* The upthrust must be equal to the weight of the object.

* This means the forces are balanced, resulting in no net force acting on the object.

Let me know if you'd like a more detailed explanation of upthrust or examples of how this works!