1 Flashcards
There
were scientists who supported
the geocentric model like
Eudoxus, Aristotle, and Ptolemy
scientists who believed in Heliocentric theory.
Aristarchus and Copernicus
Theories and models of the universe have
been proposed by
greek
is a concept that describes the Earth as the centre of the Universe
Geocentric model
is an astronomical model in which the Earth and planets move around the Sun at the centre of the Solar system
Heliocentric model
Earth is at the centre of Universe and other objects revolve around it
geocentric
Sun is at the centre of the solar system while other objects including the Earth revolve around the Sun
heliocentric
made accurate
measurements and observations of the
position of stars, sun, moon, and the
planets even before the invention of
telescope.
Tycho Brahe
Student of tycho brahe
johannes kepler
He formulated the three
laws of planetary motion based on
the data gathered by Tycho Brahe.
johannes kepler
he believed in a model that the
sun orbiting the Earth but the
other planets orbiting the sun,
Brahe
Kepler also observed that the orbits of the planets are ellipse with the sun at one focus
thus formulating his first law of planetary motion, the
Law Of Ellipses.
He explained that the planet
moves faster when it is near
the sun and slower when it is
far from the sun. this
observation led him to
formulate his second law of
planetary motion which he
called
Law Of Equal Areas.
In his third law
the law of periods, He
showed that there is a
precise mathematical
relationship between a
planet’s distance from
the sun and the
amount of time it
takes to revolve
around the sun.
Laws of Planetary motion
the motion of a projectile which is the
result of the tendency of any object in motion, to remain in
motion at constant velocity.
HORIZONTAL MOTION
is referred as the movement of the object
against the gravitational pull. It can also be a straight upward
and downward motion.
VERTICAL MOTION
is a form of motion experienced by an
object or particle that is projected near the Earth’s surface and
moves along a curved path under the action of gravity only.
PROJECTILE MOTION
Vertical motion is referred to as NATURAL MOTION.
In a natural motion, theobject will move and will return to its natural state based on the object’s material or composition - earth, water, air, and fire.
Aristotle
An object moving in a violent motion requires push or pull to maintain horizontal
motion. Motion continues only so long as there is an applied force to an object.
WHEN THE FORCE IS REMOVED, MOTION STOPS.
ARISTOLE
believed that the projectile motion of an object is parallel to the ground
until it is the object’s time to fall back into the ground. An impetus will be kept by
the object until such time that the initial force is forgotten, and the object
returns to its natural state to stop moving and fall to the ground.
Aristotle
He viewed projectile motion as natural
and violent motion.
He said that HEAVY OBJECTS FALL
FASTER THAN LIGHT ONES
Aristotle
In the absence of a resistance, objects would fall not depending on their weight,
but in the time of fall. Also, if the object encountered a resistive force from a fluid
equal or greater than its weight, it will slow down and reaches a uniform motion
until it reaches the bottom and stops.
Vertical Motion -galileo
object in motion, if not obstructed or hindered, will continue to be in motion,
and an external force is not necessary to maintain the motion. If the Earth’s
surface is very flat and extended infinitely, objects that are pushed will not be
hindered. Thus, the objects will continue to move. This kind of motion, however,
is not evident in nature.
Horizontal Motion - galileo
performed experiments on uniformly accelerated motion using an
inclined plane, and used the same apparatus to study projectile motion.
he was credited for quantifying the “rate of fall” by measurement of
distance and time and plotting it graphically.
Projectile Motion
Galileo
