Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
For
0
≤
t
≤
4
0\le t\le4
0
≤
t
≤
4
, the position of a particle is
r
(
t
)
=
⟨
(
t
−
2
)
2
,
(
t
−
2
)
3
⟩
\mathbf r(t)=\langle (t-2)^{2},\,(t-2)^{3}\rangle
r
(
t
)
=
⟨(
t
−
2
)
2
,
(
t
−
2
)
3
⟩
. At which of the following times is the particle at rest? a)
t
=
1
t=1
t
=
1
b)
t
=
3
t=3
t
=
3
c)
t
=
2
t=2
t
=
2
d) The particle is never at rest on
[
0
,
4
]
[0,4]
[
0
,
4
]
Browse the problem library