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Mathematics
Problem
A particle moves so that
r
=
1
+
t
r=1+t
r
=
1
+
t
and
θ
=
t
\theta=t
θ
=
t
, where
t
t
t
is in seconds. What is the magnitude of the acceleration of the particle at
t
=
1
t=1
t
=
1
? a)
2
\sqrt{2}
2
b)
5
\sqrt{5}
5
c)
2
2
2\sqrt{2}
2
2
d)
4
4
4
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