Exploration Lab of Buoyant Forces
2. 1000 - 10g standard masses
3. Newton Scale
4. 250g graduated cylinder
5. 500 mL beaker
Table of Measurements
Measured amount of water: 500mL and 400mL
Object Weight in air (N) Weight in water (N) Buoyant force (N)
1000g Standard Mass 8.5N 6N 2.5N
500g Standard Mass 5N 4N 1N
200g Standard Mass 2N 1.5N 0.5N
100g Standard Mass 1N 0.8N 0.2N
50g Standard Mass 0.5N 0.4N 0.1N
25g Standard Mass 0.25N 0.2N 0.05N
10g Standard Mass 0.125N 0.1N 0.025N
Object Volume of Displaced water (mL) Weight of Displaced Water
1000g Standard Mass 350mL 3.43N
500g Standard Mass 50mL 0.49N
200g Standard Mass 10mL 0.098N
100g Standard Mass 3mL 0.0294N
50g Standard Mass 1.5mL 0.0147N
25g Standard Mass 0.75mL 0.00735N
10g Standard Mass 0.375mL 0.003675N
Analize and Conclude
1. Observing; What force is responsible for the difference between the weight of each object in the air and its apparent weight in water?
-- Buoyant force
2. Analyzing Data; How is buoyant force related to the weight of water displaced?
-- Each millilitre of water has a weight of 0.0098 newtons.
3. Forming Operational Definitions; Define buoyant force and describe two ways you can measure it or calculate it.
-- Buoyant force is a force that gives an ability to float in a fluid (water and air). We can measure it by using a measurement object with the object you want to measure and place it in water. The buoyant force would be weight in air minus the apparent weight in water.
4. Drawing Conclusions; Explain what causes an object to sink or to float, using the terms buoyancy, weight, force, density and gravity.
-- Buoyancy is a force that opposes gravity which allows something to float in a fluid - floating, however, if there is no oxygen / air in those objects, it will sink because of how gravity works with force.