Question bank/JEE Main/Physics

For the situation shown in figure below, there is no friction
between pulley and string. For which of the following values of mass of
block A, the system will stay at rest $(g = 10m/s^{2})$

A4 KgB8 KgC16 KgD30 Kg

Show answer and solution▾

Tension in string =100 N in equilibrium F.B.D. of A
$F_{s} = 80 \leq \mu N$
$80 \leq \frac{1}{2}(mg - 60)$
$mg \geq 220$
$m \geq 22$

Source: Grass-G / P-16 Physics paper 25 Nov First.docx