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Mathematics
Mathematics
Problem
Suppose
a
(
t
)
=
⟨
6
t
,
12
⟩
\mathbf a(t)=\langle 6t,12\rangle
a
(
t
)
=
⟨
6
t
,
12
⟩
for a particle in the plane. If
v
(
1
)
=
⟨
10
,
−
4
⟩
\mathbf v(1)=\langle 10,-4\rangle
v
(
1
)
=
⟨
10
,
−
4
⟩
and
r
(
1
)
=
⟨
−
2
,
5
⟩
\mathbf r(1)=\langle -2,5\rangle
r
(
1
)
=
⟨
−
2
,
5
⟩
, what is
r
(
3
)
\mathbf r(3)
r
(
3
)
? a)
⟨
32
,
21
⟩
\langle 32,21\rangle
⟨
32
,
21
⟩
b)
⟨
38
,
15
⟩
\langle 38,15\rangle
⟨
38
,
15
⟩
c)
⟨
38
,
21
⟩
\langle 38,21\rangle
⟨
38
,
21
⟩
d)
⟨
32
,
15
⟩
\langle 32,15\rangle
⟨
32
,
15
⟩
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