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Physics
Physics
Problem
In one-dimensional motion, the displacement
Δ
x
\Delta x
Δ
x
of a particle is best described as a)
Δ
x
=
∣
x
2
−
x
1
∣
\Delta x = |x_2 - x_1|
Δ
x
=
∣
x
2
−
x
1
∣
(magnitude only, no sign) b)
Δ
x
=
x
2
−
x
1
\Delta x = x_2 - x_1
Δ
x
=
x
2
−
x
1
(keeping sign) c)
Δ
x
=
x
1
+
x
2
2
\Delta x = \dfrac{x_1 + x_2}{2}
Δ
x
=
2
x
1
+
x
2
(average of the two positions) d)
Δ
x
=
x
1
−
x
2
\Delta x = x_1 - x_2
Δ
x
=
x
1
−
x
2
(reverse order)
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