if each object in the universe attract every other objects why don't two book kept on a table come towards each other and collide
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If each object in the universe attracts every other object, why don't two books kept on a table come towards each other and collide?
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Toby Worth
Toby Worth, Practicing Astronut
Answered Sep 9, 2015
Friction.
The truth is, they ARE attracting each other, but the table (or shelf) that they're on provides drag so they never actually move. Remember, gravity is acting upon them in the downwards direction, too! The Earth's pull is far greater than either book's toward each other.
Imagine if the two books were, say, a foot apart and in free-fall in a vacuum: they would slowly move together in this friction-less environment until they collided and then would bounce apart (a tiny amount). They would gradually bounce-attract-bounce less and less vigorously until they came to rest against each other. They'd lose energy in each bounce as the kinetic energy turned into heat (absorbed by the book and radiated away). Technically there'd be a small sound, but it wouldn't be audible due to the low power in the collision and highly rarefied transmission medium (i.e. particles of debris generated by the collision itself).
Still have a question? Ask your own!
What is your question?
13 ANSWERS
Toby Worth
Toby Worth, Practicing Astronut
Answered Sep 9, 2015
Friction.
The truth is, they ARE attracting each other, but the table (or shelf) that they're on provides drag so they never actually move. Remember, gravity is acting upon them in the downwards direction, too! The Earth's pull is far greater than either book's toward each other.
Imagine if the two books were, say, a foot apart and in free-fall in a vacuum: they would slowly move together in this friction-less environment until they collided and then would bounce apart (a tiny amount). They would gradually bounce-attract-bounce less and less vigorously until they came to rest against each other. They'd lose energy in each bounce as the kinetic energy turned into heat (absorbed by the book and radiated away). Technically there'd be a small sound, but it wouldn't be audible due to the low power in the collision and highly rarefied transmission medium (i.e. particles of debris generated by the collision itself).
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Yes it is true every object has the attractive force that attracts other objects but mainly most of the substance dont that that High potential to pull a object like a magnet....so the object dont collide... mainly the attractive force formed due to a object on another is almost negligible as compared to the mass of other
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