the uptrust is equal to the weight of the body is when?

The uptrust is equal to the weight of the body when the body is in equilibrium, meaning that the net force acting on the body is zero. This typically occurs when the body is at rest or moving at a constant velocity. In this situation, the upthrust force (also known as buoyant force) acting on the body is equal in magnitude but opposite in direction to the weight of the body, resulting in a balanced force system.

When the body is fully submerged in a fluid at rest