history of motion Flashcards
Who was Aristotle?
A great Greek Scientist and Philosopher
He was a student of Plato.
What is Geocentrism?
The belief that the planets and Sun revolved around Earth
‘geo’ refers to ‘earth’; ‘centrism’ refers to ‘center’.
What is the concept of Free Fall proposed by Aristotle?
Objects that have more mass fall at faster rates than do lighter things
Who was Galileo Galilei?
A great Italian Physicist and Astronomer
Known as the ‘Father of Modern Science’.
What is Heliocentrism?
The accepted belief that all the planets in our solar system revolve around the Sun
‘helio’ refers to the ‘sun’.
What did Galileo help to disprove?
Aristotle’s 2 claims of motion
In a vacuum, what happens to all objects regardless of mass?
They fall at the same rate
Who was Sir Isaac Newton?
A prominent scientist born on December 25, 1643, in England
Considered the greatest scientist that has ever lived.
What field did Sir Isaac Newton help to create?
Newtonian Physics
What does Newtonian Physics involve?
Force, energy, gravity, and motion of objects
What is gravity?
A natural phenomenon by which all physical bodies attract each other
What is the relationship between mass and gravitational attraction?
The attraction is directly proportional to the mass of an object
What does gravity give to objects?
Weight
How is weight measured?
In units called Newtons (N)
What is the formula for Weight?
W = mg
In the formula W = mg, what does ‘g’ represent?
The force of gravity = 9.8 m/sec²
What is the weakest of the four fundamental forces of nature?
Gravity
What happens to the pull of gravity as the size of an object increases?
The pull of gravity becomes more powerful
Who was Archimedes?
An Ancient Greek Mathematician and Physicist
What principle did Archimedes propose?
The concept of buoyancy in his Archimedes Principle
What is buoyancy?
An upward force that is contrary to gravity
Buoyancy is usually associated with objects in _______.
[liquids or gases]
