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Laws of Motion
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Equilibrium of Bodies
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If a street light of mass M is suspended
Question
If a street light of mass
M
is suspended from the end of uniform rod of length
L
in the different possible patterns as shown in figure, then
A
Pattern
A
is more sturdy
B
Pattern
B
is more sturdy
C
Pattern
C
is more sturdy
D
none of these
Hard
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Solution
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Correct option is A)
Torque croated due to weight of streat light remains
same in all the three cases.
9
t
is balanced by
torque created by tension in the string. So if
γ
be the torque created by weight of lamp and
T
’
be tension in the string and ’
d
’ be perpendicular
distance of cable from the axis thou,
τ
=
T
⋅
d
Tension will be least for laxgest’d’. This is
in pattern
A
is more sturdy.
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