The force that opposes gravitational force on an object submerged in fluid is called?

The force that opposes gravitational force on an object submerged in a fluid is known as upthrust, or buoyant force. This force is a result of the pressure difference exerted by the fluid on the object, which arises because the fluid pressure increases with depth. As the object is submerged, the pressure acting on the bottom surface of the object is greater than that on the top surface, creating an upward net force. This upward force counteracts the weight of the object, which is the force due to gravity pulling it downward.

In contrast, drag refers to the resistance experienced by an object moving through a fluid, while lift is a force that acts perpendicular to the direction of motion, commonly associated with the forces acting on an aircraft wing. Weight is simply the force due to gravity acting on an object. Thus, upthrust is the specific force that directly opposes weight when an object is in a fluid.