Answer:
1- Buoyant force
2 - Gravitational force
3 - Drag force
Step-by-step explanation:
The forces acting on the ball are the following:
The buoyant force exerted on the ball (acting upward).
This force is the result of the fluid ( the oil) acting on the ball. This force counters the gravitational force and reduces the 'weight' of the object if a spring scale is used to weigh the ball.
Gravitational force due to the weight of the ball,
This force acts on every object having mass. Since the ball has a definite mass, a gravitational force acts on it, pointing downward ( towards earth)
Drag force acting on the ball as a consequence of its motion through the oil.
The drag force acts on an object whenever it moves through a fluid. This force acts such as to reduce the speed of the object. This is the force that will eventually make the ball stop at some point in the cylinder.
The result of these three forces is that if the metal ball is dropped into the cylinder, its speed will eventually decrease as it hits the bottom of the cylinder. Depending on how hard it was dropped and its weight, the metal ball might not even reach the bottom of the cylinder.