Work Assignment Help
The work
W done by a constant force
F when its
point of application undergoes a displacement
s is defined to be
W = F s cos q

where
qis the angle between

and

as indicated in figure. Only the component of

along
s, that is,
F cos q, contributes to the work done. Strictly speaking, the work is done by the
source or
agent that applies the force. Work is a
scalar quantity and its
SI unit is the
joule (J).
Work is also defined as the
dot product of force and its displacement as given by equation
W =

In terms of rectangular components, the two vectors are

=
Fx
+
Fy 
+
Fz 
and

= D
x
+ D
y
+ D
z
;
hence, the definition of work may be written as
W =
Fx D
x +
Fy D
y +
Fz D
z
The work done by a given force on a body depends only on the
force, the
displacement, and the
angle between them. It does not depend on the velocity or the acceleration of the body, or on the presence of other forces.
Since the work is a scalar, its value also does not depend on the orientation of the coordinate axes. Since the magnitude of a displacement in a given time interval depends on the velocity of the
frame of reference used to measure the displacement,
the calculated work also depends on the reference frame.
We are offering the following main topics for assignment like:
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