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Questions and Answers
What did Aristotle believe about natural motion?
What did Aristotle believe about natural motion?
- It can be described by mathematics and physical variables.
- It involves an object thrown at a certain angle with impetus.
- It requires an external force to move.
- Objects move and return to their natural state based on their material. (correct)
According to Aristotle, what is violent motion?
According to Aristotle, what is violent motion?
- An object moving with an external push or pull. (correct)
- Involves an object with impetus.
- An object moving without any force applied.
- Requires no external force.
What did Galileo believe was necessary for an object to maintain motion?
What did Galileo believe was necessary for an object to maintain motion?
- External force (correct)
- Impetus
- Material of the object
- Composition of objects
'An object in uniform motion will travel a distance that is proportional to the time it will take to travel' demonstrates which concept?
'An object in uniform motion will travel a distance that is proportional to the time it will take to travel' demonstrates which concept?
'An object thrown at a certain angle is given an impetus' reflects which scientist's viewpoint?
'An object thrown at a certain angle is given an impetus' reflects which scientist's viewpoint?
'An object in motion, if unimpeded, will continue to be in motion' contrasts with which of Aristotle's concepts?
'An object in motion, if unimpeded, will continue to be in motion' contrasts with which of Aristotle's concepts?
In which kind of motion does an object continue to move without the need for an external force to maintain its motion?
In which kind of motion does an object continue to move without the need for an external force to maintain its motion?
What happens to an object in vertical motion if it encounters a resistive force from a fluid equal to or greater than its weight?
What happens to an object in vertical motion if it encounters a resistive force from a fluid equal to or greater than its weight?
According to Galileo, what is projectile motion a combination of?
According to Galileo, what is projectile motion a combination of?
If an object is released from the same height, why would a 1-kg object and a 10-kg object fall at the same speed in the absence of resistance?
If an object is released from the same height, why would a 1-kg object and a 10-kg object fall at the same speed in the absence of resistance?
What happens to a ball on an infinitely flat plane if unimpeded?
What happens to a ball on an infinitely flat plane if unimpeded?
If a stone were dropped into a pool of water, what is expected to happen to its speed?
If a stone were dropped into a pool of water, what is expected to happen to its speed?
Flashcards
Aristotle's Natural Motion
Aristotle's Natural Motion
Objects tend to move and return to their 'natural state' depending on their material composition.
Aristotle's Violent Motion
Aristotle's Violent Motion
Motion caused by an external push or pull acting on an object.
Galileo's Motion Belief
Galileo's Motion Belief
An object maintains its motion without needing any external force.
Galileo's Mathematical Motion Description
Galileo's Mathematical Motion Description
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Impetus
Impetus
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Motion vs. Natural State
Motion vs. Natural State
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Sustained Horizontal Motion
Sustained Horizontal Motion
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Vertical Motion with Resistance
Vertical Motion with Resistance
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Projectile Motion
Projectile Motion
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Equal Falling Speed
Equal Falling Speed
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Ball on Infinite Plane
Ball on Infinite Plane
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Stone Dropped in Water
Stone Dropped in Water
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Study Notes
Aristotelian Conceptions of Motion
- According to Aristotle, motion can be either natural or violent.
- Natural motion: an object moves and returns to its natural state based on its material/composition.
- Violent motion: an object requires an external force (push or pull) to move.
Aristotelian View of Projectile Motion
- Aristotle believed that an object thrown at an angle has an impetus (a force or energy) that allows it to move.
- The object continues to move until its impetus is lost, and it returns to its natural state, causing it to stop and fall.
Galilean Conceptions of Motion
- Galileo believed that motion can be described by mathematics and changes in physical variables such as time and distance.
- He disproved Aristotle's claims that motion is due to an object's composition.
Galileo's Laws of Motion
- An object in uniform motion will travel a distance proportional to the time it takes to travel.
- A uniformly accelerating object will travel at a speed proportional to some factor of time.
- An object in motion, if unimpeded, will continue to be in motion; an external force is not necessary to maintain the motion.
Horizontal Motion
- An object in motion, if unimpeded, will continue to be in motion, and an external force is not necessary to maintain the motion.
- On a flat and extended surface, objects that are pushed will not be impeded and will continue to move.
Vertical Motion
- In the absence of resistance, objects would fall equally, regardless of their weight, in the same amount of time.
- If an object encounters a resistive force equal to or greater than its weight, it will slow down and reach a uniform motion until it reaches the bottom and stops.
Projectile Motion
- A projectile is a combination of uniform motion in the horizontal direction and uniformly accelerated motion in the vertical direction.
- If unimpeded, a projectile will continue to move even without an applied force.
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