Question

Lead has greater density than iron and both are denser than water. Is the buoyant force on a lead object greater than, less than or equal to the buoyant force on an object of the same volume?

Answer 1

Buoyant force is calculated by the product of the volume of the displaced liquid, specific density of the liquid and the acceleration due to gravity.

When an iron and lead object of the similar volume is immersed into the liquid it will lead to the similar force.

Specific density is the primary factor to determine the upward thrust

Answer 2

Buoyant force is calcutaled by the weight of the water displaced by the object. So, if lead and iron replace same volume of water then buoyant force on both of them will be equal.