Work (physics) | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-24

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Work_(physics)


00:00:52 1 Units
00:01:49 2 Work and energy
00:05:04 3 Constraint forces
00:06:44 4 Mathematical calculation
00:07:03 4.1 Work done by a variable force
00:07:12 4.2 Torque and rotation
00:12:17 5 Work and potential energy
00:14:02 5.1 Path dependence
00:19:04 5.2 Path independence
00:19:27 5.3 Work by gravity
00:19:34 5.4 Work by gravity in space
00:21:11 5.5 Work by a spring
00:24:28 5.6 Work by a gas
00:24:48 6 Work–energy principle
00:26:18 6.1 Derivation for a particle moving along a straight line
00:32:01 6.2 General derivation of the work–energy theorem for a particle
00:32:13 6.3 Derivation for a particle in constrained movement
00:33:58 6.3.1 Vector formulation
00:34:28 6.3.2 Tangential and normal components
00:37:02 6.4 Moving in a straight line (skid to a stop)
00:41:08 6.5 Coasting down a mountain road (gravity racing)
00:43:40 7 Work of forces acting on a rigid body
00:48:55 8 References
00:50:07 8.1 Bibliography
00:55:52 9 External links
00:59:22 Moving in a straight line (skid to a stop)
01:00:05 (d, 0) and the velocity is V
01:00:19 0, and F ⋅ V
01:03:28 W/g.
01:03:31 Coasting down a mountain road (gravity racing)
01:07:52 mg.
01:07:56 Work of forces acting on a rigid body
01:08:29 1, ..., n  are defined by the movement of the rigid body.  This movement is given by the set of rotations [A(t)] and the trajectory d(t) of a reference point in the body.  Let the coordinates xi i



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SUMMARY
=======
In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force.  For example, when a ball is held above the ground and then dropped, the work done on the ball as it falls is equal to the weight of the ball (a force) multiplied by the distance to the ground (a displacement).
Work transfers energy from one place to another, or one form to another.
According to Jammer, the term work was introduced in 1826 by the French mathematician Gaspard-Gustave Coriolis as "weight lifted through a height", which is based on the use of early steam engines to lift buckets of water out of flooded ore mines. According to Dugas, it is to  Solomon of Caux "that we owe the term work in the sense that it is used in mechanics now".The SI unit of work is the joule (J).