The suggestion that the body really wanted to go straight…
““The suggestion that the body really wanted to go straight but some mysterious agent made it go crooked is picturesque but unscientific. It makes two properties out of one; and then we wonder why they are always proportional to one another - why the gravitational force on different bodies is proportional to their inertia or mass. The dissection becomes untenable when we admit that all frames of reference are on the same footing. The projectile which describes a parabola relative to an observer on the earth's surface describes a straight line relative to the man in the lift. Our teacher will not easily persuade the man in the lift who sees the apple remaining where he released it, that the apple really would of its own initiative rush upwards were it not that an invisible tug exactly counteracts this tendency. (The reader will verify that this is the doctrine the teacher would have to inculcate if he went as a missionary to the men in the lift.)””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Our perception of motion depends on reference frames; what seems curved in one view may be straight in another, challenging intuitive physics.
In simple terms: Motion appears different from different viewpoints.
Key Takeaway
Question assumptions about motion.
Themes
relativity
perception
physics
Mood
curious
analytical
Type
philosophical
educational
When to use this quote
- teaching physics
- science communication
- philosophical debate
Key Concepts
frame of reference
gravity
inertial motion
Questions to Reflect On
- Can you think of other phenomena that change with perspective?
- How does this affect our understanding of truth?
A Different Perspective
Our everyday intuition often misleads us about physical reality.