|Science Focus Topic 7 Notes: Buoyancy||| Print ||
Key objectives in this topic:
Buoyancy is the tendancy of a substance to float, p. 72
Buoyant objects take up space in a fluid. pushing some of the fluid away or displacing it, causing them to float, because the fluid pushes back against the force of gravity. p. 72
Measurement of Buoyancy
Force is a push or a pull on an object, and is measured in newtons (N), p.74,
The upward force of a fluid on an object is called its buoyant force, which is also measured in newtons. p.74
Calculation of Buoyant Force (Activity 2-7. p. 75)
Practical Applications (Pages 72. 73. 76. 77)
Hot air balloons.
Floating (pontoon) bridges
Oil spills (Environmental clean-up).
Bartending (making fancy drinks)