1. Buoyant force: This force acts upwards, opposing the weight of the object. It is caused by the pressure difference between the top and bottom of the object, which is due to the weight of the fluid above it. The buoyant force is equal to the weight of the fluid displaced by the object. This is known as Archimedes' principle.
2. Drag force: This force acts in the opposite direction of the object's motion. It is caused by the friction between the object's surface and the fluid. The drag force depends on the object's shape, speed, and the viscosity of the fluid.
In addition to these two main forces, other forces might be present depending on the situation, such as:
* Gravity: Always acting downwards, pulling the object towards the center of the earth.
* Tension: If the object is attached to something (like a string or rope), tension might act on it.
* Thrust: If the object is self-propelled, like a submarine, there would be a thrust force acting on it.
It's important to remember that the net force acting on the submerged object is the vector sum of all these individual forces. This net force determines the object's motion in the fluid.
