In physics, work is defined as a force applied over a distance, resulting in the displacement of an object. It is measured in joules (J)
Power is defined as the rate at which work is done or the rate at which energy is transferred. Power is measured in watts (W) and is represented by the symbol '...
Unut- (Work, Pow er ond Env)
and
Wosk Whun a
torce us appled on a bod1that bodymoves un he
ducechon oh
torce, thn work sud to be done
Examplo
(
Push a table a horse
bulh a cat, on egine pulla train
Wosk done (W) Fosce x diaplacemunt un he duechon horre
Work done salas
a
quanh , houjoe
whwu 8 u anglu blw
bose and diaplacamonk
Thus, wos kdone u maswud by the dot produet o4 fovce and duplarc
Jts dimensional
tormua a - i'T]
ts SI uwmut u Joule and cg unt
e
Joula 2 Nuston x Imetr
J IN m
Onu ou 6 wosk said to be done when a hosce b me
neudton
duplace a body thocough òne mukY.
Nakuu o workdone ^ Workdone may be po44hve , ngah ve ond 3eo
Posuhve woTk toree achn on a body has a Component n the
deechion ot the duplocamint, then the woskdo ne by th tore us poh
3 h e angle blw toce and duplacement l u behoen O amd 90
Hhun
oorkdont pouhve Ci.e Lq0)
Exonble'inPshing a table,
h
i hen a horae þuis a cat,
Om duechom
thun applied tove amd duplacentnt dn
) When a body tally tcaely wnde grau he toosk do ne by he grau by
bowhive
Ngahve woskdonu. 94a tore achng on a body a a Componun m
the oppoute dviechon O duplocomemt the wo kdone is ngahve
hen angle b/w F and S ie between 9o and 180 4BEAK
Hhen work do ne u ngahve. 790
xamble i When a body y d the wrrkdone by graurtahonal oice
Jnlgahve
) When a pomhve Choge u moved tooands anotho pohhve hage, h
workdor by he tosce upulsive tosce ngahve.
, wo 0oyCAOUOjJEo|jqndsiiou jew3
Q
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