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Physics
Physics
Problem
A car is at
x
=
20
m
x=20\,\text{m}
x
=
20
m
at
t
=
0
t=0
t
=
0
and reaches
x
=
100
m
x=100\,\text{m}
x
=
100
m
at
t
=
4
s
t=4\,\text{s}
t
=
4
s
. Calculate its average velocity during this interval. a)
25
m
s
−
1
25\,\text{m\,s}^{-1}
25
m
s
−
1
b)
20
m
s
−
1
20\,\text{m\,s}^{-1}
20
m
s
−
1
c)
16
m
s
−
1
16\,\text{m\,s}^{-1}
16
m
s
−
1
d)
−
20
m
s
−
1
-20\,\text{m\,s}^{-1}
−
20
m
s
−
1
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