Archimedes Principle
Science: KS3, topic 3.2.25
The Archimedes Principle
Archimedes was a Greek scientist. He is famous for shouting ‘eureka’ and running through the streets naked after he noticed how his bath overflowed as he stepped into it.
The Archimedes Principle
- Archimedes was a Greek scientist who is credited for, among other inventions, the catapult, hydraulic screw, and the Archimedes Principle.
- The Archimedes Principle states that an object submerged in a liquid experiences an upthrust equal to the weight of the liquid displaced by the object.
- Upthrust is the force of water (or a gas) pushing up on the object.
Density
- Understanding density is key to understanding whether or not an object will sink or float.
- Density is the amount of particles a substance has in its volume.
- An object with lots of particles packed into a smaller volume will have a high density.
- Density is calculated by the equation:
- Density = mass ÷ volume.
- As density increases, so does upthrust.
- Seawater is denser than freshwater.
Test yourself on Archimedes Principle
What does the Archimedes principle state?
Which of the following are true of density?
Which of these is NOT an invention of Archimedes?
Which of these is denser?
Getting into a bath will replace the same volume of water from the bath if it is completely full. What is this called?