Question

Two blocks of masses `1 kg` and `2 kg` are connected by a metal wire going over a smooth pulley as shown in figure.
The breaking stress of the metal is `(40//3pi)xx10^(6)N//m^(2)`. If `g=10ms^(-2)`, then what should be the minimum radius of the wire used if it is not to break?

A. `0.5mm`
B. `1mm`
C. `1.5mm`
D. `2mm`

Answer 1

Correct Answer - B
`T = (2m_(1) m_(2))/(m_(1) + m_(2)), B.S = (T)/(A)`