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Physics
Physics
Problem
A particle of mass
m
m
m
is moving in time
t
t
t
on a trajectory given by
r
=
10
α
t
2
i
^
+
5
β
(
t
−
5
)
j
^
\mathbf{r} = 10\alpha t^2 \hat{i} + 5\beta(t - 5) \hat{j}
r
=
10
α
t
2
i
^
+
5
β
(
t
−
5
)
j
^
where,
α
\alpha
α
and
β
\beta
β
are dimensional constants. The angular momentum of the particle becomes the same as it was for
t
=
0
t = 0
t
=
0
at time
t
t
t
is ...... s.
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