physics lab

Lab: Buoyancy Post-Lab Knowledge Check Name: Physics 242

Copyright 2005 by S.E. Kanim, M.E.Loverude, and L.G. Ortiz 1

Be sure to use your notes and responses from the lab you conducted to answer this lab homework. Check that your answers are consistent with your observations from the lab and what you have learned in the mini lecture.

Three blocks of the same size and shape are placed in a tank of

water as shown below. The masses of the blocks are unknown.

Blocks A and B are suspended from strings attached to spring

scales. Both spring scales read 5 N. Block C is floating as

shown.

1. Is the magnitude of the buoyant force on block B greater than, less than, or equal to the magnitude of the buoyant force on block A? Explain.

2. Is the mass of block B greater than, less than, or equal to the mass of block A? Explain.

3. Is the magnitude of the buoyant force on block C greater than, less than, or equal to the magnitude of the buoyant force on block A? Explain.