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Physics
Physics
Problem
An object moves
Δ
x
\Delta x
Δ
x
metres east and
Δ
y
\Delta y
Δ
y
metres north. Which of the following expressions gives the magnitude of its displacement? a)
Δ
x
+
Δ
y
\Delta x + \Delta y
Δ
x
+
Δ
y
b)
(
Δ
x
)
2
+
(
Δ
y
)
2
2
\sqrt{\dfrac{(\Delta x)^2 + (\Delta y)^2}{2}}
2
(
Δ
x
)
2
+
(
Δ
y
)
2
c)
(
Δ
x
)
2
+
(
Δ
y
)
2
\sqrt{(\Delta x)^2 + (\Delta y)^2}
(
Δ
x
)
2
+
(
Δ
y
)
2
d)
∣
Δ
x
−
Δ
y
∣
|\,\Delta x - \Delta y\,|
∣
Δ
x
−
Δ
y
∣
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