Question

When an object is immersed in a fluid, which of the following forces will act on the object?

• A. Gravitational force
• B. Buoyant force
• C. Both A and B
• D. Frictional force

Answer 1

Answer: (A), (B)

The correct options are
A

Gravitational force

B

Buoyant force

When an object is immersed in a fluid two forces act on it, gravitational force and buoyant force. Buoyant force is the upward force that acts on this object. It depends on the volume of the block and density of the fluid. Gravitational force is basically the weight $W$ of the body, which acts vertically downward, through the center of gravity of the body.