Question

An object weighing 50kg is floating in a fluid. What is the buoyant force of the fluid applied to the object?
1. Greater than 50kg
2. Less than
3. None
4. Exactly 50 kg

Answer 1

If it is floating, it has no motion. Any mass the has no motion or continuous in constant motion has not net force acting on it.

There are two forces acting on the mass: gravity and buoyancy.

These two must be exactly equal and cancel.

Therefore the answer is: ....

Answer 2

None?