What was Philoponus known for?

John Philoponus, a Christian philosopher, scientist, and theologian who lived approximately from 490 to 570 CE, is also known as John the Grammarian or John of Alexandria. Philoponus’ life and work are closely connected to the city of Alexandria and the Alexandrian Neoplatonic school.

What did Philoponus discover?

The Astrolabe The word astrolabe comes from two Greek words meaning ‘to follow the stars. ‘ It is through Philoponus’ work that today we know something of Theon’s astrolabe work. The first astrolabe – a spherical astrolabe, more commonly called an armillary sphere – was invented by Eratosthenes in the third century BC.

Did John Philoponus agree with Aristotle?

In the latter work Philoponus became one of the earliest thinkers to reject Aristotle’s dynamics and propose the “theory of impetus”: i.e., an object moves and continues to move because of an energy imparted in it by the mover and ceases the movement when that energy is exhausted.

Who said that impetus keeps a body moving?

Jean Buridan
In the 14th century, Jean Buridan postulated the notion of motive force, which he named impetus. When a mover sets a body in motion he implants into it a certain impetus, that is, a certain force enabling a body to move in the direction in which the mover starts it, be it upwards, downwards, sidewards, or in a circle.

What maintains motion of projectile after its left the thrower’s hand?

Big Problem: What maintains the motion of a projectile after it’s left the thrower’s hand? Medium is the required contact force. Medium flows around object to fill in space left behind. Result: Object is pushed foward.

What scientific ideas did John philoponus?

From the point of view of astronomy, Philoponus’ two most important contributions to the development of science are his theory of matter and the theory of the impetus, which he seems to have embedded into a whole new view of explaining natural and forced motion of bodies.

What is the difference between momentum and impetus?

As nouns the difference between impetus and momentum is that impetus is something that impels, a stimulating factor while momentum is (physics) (of a body in motion) the product of its mass and velocity.

What is violent motion?

Violent motion, by contrast, is motion contrary to the nature of the object and requires an external force in order to occur. Most motions are of this type. A stone thrown into the air moves in a violent motion, against its nature and therefore requires force in order to cause it to move.

What keeps an object at rest and what keeps it moving?

Inertia. Because of inertia, an object at rest rends to stay at rest. An object in motion tends to keep moving at a constant speed in a straight line.

What made Galileo’s conception on projectile motion better than Aristotle?

Aristotle says that the heavier things are, the quicker they will fall, whereas Galileo felt that the mass of an object made no difference to the speed at which it fell. They concluded that Aristotle was correct and it is the force of gravity that makes this happen.

What are the 4 types of motions?

The four types of motion are:

• linear.
• rotary.
• reciprocating.
• oscillating.

What is the example of violent motion?

Examples of violent motion include: Pushing a book along a table. Lifting a book. Violent motion is caused by external forces applied to the object. 3.3 Galileo showed that objects of different masses fell at the same rate and that once an object is moving, no force is needed to maintain motion.