Question

If flat car is given an acceleration $a_0=2m/s^2$ starting from rest, compute tension in the light inextensible string connected to block of mass $50kg$. Neglect mass of pulley and its friction. Coefficient of friction between block and flat car is $\mu =0.30$.

Answer 1

For this body to be in equilibrium,

$f=T$

$f=\mu mg$

So,

$F=T+f$

$F=2\mu mg$