Question

A plastic cube with a coin taped to its top surface is floating partially submerged in water. A student marks the level of the water on the cube, and then removes the coin and tapes it to the bottom of the cube. Afterward, the student returns the cube to the water.

a. above the water line

b. below the water line

c. level with water line

Answer 1

When the coin is placed at the top of the plastic cube, the buoyant force acting on the cube is, the coin is placed at the Now, when bottom of the cube, the force of buoyancy is different. This is because the volume displaced is not same in two cases. Hence, the water level will be above the water line Thus, the option a is correct