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Physics
Physics
Problem
Explain why, when a force acting on a particle varies with position along a straight line, the total work done from
x
=
x
1
x = x_1
x
=
x
1
to
x
=
x
3
x = x_3
x
=
x
3
can be expressed as the algebraic sum of the work done from
x
1
x_1
x
1
to
x
2
x_2
x
2
and that from
x
2
x_2
x
2
to
x
3
x_3
x
3
, where
x
1
<
x
2
<
x
3
x_1 < x_2 < x_3
x
1
<
x
2
<
x
3
.
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