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Physics
Physics
Problem
The time dependence of the position of a particle of mass
m
=
2
m = 2
m
=
2
is given by
r
⃗
(
t
)
=
2
t
i
^
−
3
t
2
j
^
\vec{r}(t) = 2t\hat{i} - 3t^2\hat{j}
r
(
t
)
=
2
t
i
^
−
3
t
2
j
^
. Its angular momentum, with respect to the origin, at time
t
=
2
t = 2
t
=
2
is : a.
48
(
i
^
+
j
^
)
48(\hat{i} + \hat{j})
48
(
i
^
+
j
^
)
b.
36
k
^
36\hat{k}
36
k
^
c.
−
34
(
k
^
−
i
^
)
-34(\hat{k} - \hat{i})
−
34
(
k
^
−
i
^
)
d.
−
48
k
^
-48\hat{k}
−
48
k
^
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