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Mathematics
Problem
Explain what it indicates about the particle’s speed at time
t
=
3
t=3
t
=
3
if
v
(
3
)
⋅
a
(
3
)
<
0
\mathbf v(3)\cdot \mathbf a(3) < 0
v
(
3
)
⋅
a
(
3
)
<
0
.
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