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Physics
Physics
Problem
A train moves
320
m
320\,\text{m}
320
m
due east in
16
s
16\,\text{s}
16
s
. Which statement about its average speed
v
avg
v_{\text{avg}}
v
avg
and the magnitude of its average velocity
∣
v
ˉ
∣
|\bar v|
∣
v
ˉ
∣
is correct? a)
v
avg
>
∣
v
ˉ
∣
v_{\text{avg}} > |\bar v|
v
avg
>
∣
v
ˉ
∣
b)
v
avg
v_{\text{avg}}
v
avg
and
∣
v
ˉ
∣
|\bar v|
∣
v
ˉ
∣
cannot be compared without specifying direction c)
v
avg
=
∣
v
ˉ
∣
v_{\text{avg}} = |\bar v|
v
avg
=
∣
v
ˉ
∣
d)
v
avg
<
∣
v
ˉ
∣
v_{\text{avg}} < |\bar v|
v
avg
<
∣
v
ˉ
∣
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