BITSAT 2018 Slot 2 Solved Paper

Maximum stress =

Maximum weight

Cross- sectional area

Now, maximum weight of steel wire
Volume × Density ×g
=Alρg
where, l is the maximum length of steel wire that can hang vertically without breaking, ρ is the density of steel and A is the cross-sectional area of steel wire.
∴ Maximum stress, p=

Alρg

A

=lρg
∴ l=

p

ρg