Chapter 12.2, Problem 4aT

A rectangular block, A, is released from rest at the center of a beaker of water. The blockaccelerates upward.

1. At the instant it is released, is the buoyant forceon block Agreater than, less than, or equal to its weight? Explain.
2. When block A reaches the surface, it is observed to float at rest asshown. In this final position, is the buoyant force on the block greater than, less than, or equal to the weight of the block? (Hint: What isthe net force on the object?)
3. Are your answers to the questions above consistent with Archimedes’ principle?(Hint: How does the volume of water displaced when the block is floating compare tothat displaced when it was completely submerged?)