Buoyancy & Buoyant Force Video Lessons

Video Thumbnail

Concept

Problem: A flask of water rests on a scale that reads 100N. Then, a small block of unknown material is held completely submerged in the water. The block does not touch any part of the flask, and the person holding the block will not tell you whether the block is being pulled up (keeping it from falling further) or pushed down (keeping it from bobbing back up).The experiment is repeated with the six different blocks listed below. In each case, the blocks are held completely submerged in the water.Mass (g)Volume (cm3)A10050B100200C20050D50100E200100F40050If the blocks were released while submerged, which, if any, would sink to the bottom of the flask?

FREE Expert Solution

Density:

ρ=mv

If the density of the block is greater than the density of water, the block will sink. 

If the density of the block is less than the density of water, the block will sink. 

The density of water, ρwater = 1 g/cm3 

View Complete Written Solution
Problem Details

A flask of water rests on a scale that reads 100N. Then, a small block of unknown material is held completely submerged in the water. The block does not touch any part of the flask, and the person holding the block will not tell you whether the block is being pulled up (keeping it from falling further) or pushed down (keeping it from bobbing back up).



The experiment is repeated with the six different blocks listed below. In each case, the blocks are held completely submerged in the water.

Mass (g)Volume (cm3)
A10050
B100200
C20050
D50100
E200100
F40050


If the blocks were released while submerged, which, if any, would sink to the bottom of the flask?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Buoyancy & Buoyant Force concept. You can view video lessons to learn Buoyancy & Buoyant Force. Or if you need more Buoyancy & Buoyant Force practice, you can also practice Buoyancy & Buoyant Force practice problems.