Because its expose to the wires inside that could electrify you.
Answer:
Moment of inertia of the solid sphere:
I
s
=
2
5
M
R
2
.
.
.
.
.
.
.
.
.
.
.
(
1
)
Is=25MR2...........(1)
Here, the mass of the sphere is
M
M
d = speed x time
distance = 29 x 30
distance = 870m
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