work and energy
Work power and energy
Work is said to be done by a force, when it moves, its point of application through a distance. Applied force ‘F’ moves a body through a distance’s.
Work done ‘W’ = F x s.
The S.I. unit of work is 1 joule which is the work done by a force of moving the body through a distance of 1 metre.
Therefore
M.K.S System
joule = 1 N x 1 metre = 1 Nm
C.G.S System
Also 1 joule = 1 Nm = 10^5 dynes x 100 cm = 10^7 dynes cm=10^7 erg.
F. P. S system
1foot pondal = 1foot x 1pound
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