Mass | Wikipedia audio article
Channel: wikipedia tts
Date: 08/12/2018

This is an audio version of the Wikipedia Article:
Mass


00:00:44 1 Phenomena
00:02:09 2 Units of mass
00:02:47 3 Definitions of mass
00:05:54 3.1 Weight vs. mass
00:09:29 3.2 Inertial vs. gravitational mass
00:11:35 3.3 Origin of mass
00:12:34 4 Pre-Newtonian concepts
00:12:48 4.1 Weight as an amount
00:17:26 4.2 Planetary motion
00:18:04 4.3 Galilean free fall
00:18:14 5 Newtonian mass
00:21:25 5.1 Newton's cannonball
00:23:01 5.2 Universal gravitational mass
00:26:30 5.3 Inertial mass
00:29:57 6 Atomic mass
00:31:11 7 Mass in relativity
00:35:17 7.1 Special relativity
00:40:30 7.2 General relativity
00:40:59 8 Mass in quantum physics
00:41:09 8.1 Tachyonic particles and imaginary (complex) mass
00:42:10 8.2 Exotic matter and negative mass
00:42:20 9 See also
00:48:10 10 Notes
00:48:16 11 References
00:49:15 12 External links
00:51:58 undefined
00:57:09 undefined
00:57:37 undefined



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SUMMARY
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Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied. The object's mass also determines the strength of its gravitational attraction to other bodies. 
The basic SI unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses. An object on the Moon would weigh less than it does on Earth because of the lower gravity, but it would still have the same mass. This is because weight is a force, while mass is the property that (along with gravity) determines the strength of this force.