In the arrangement, the minimum value of tension in the string to prevent it from sliding down is

Step-by-step solution

Limiting friction along the plane upward = _s m g aligned & =0.8 1 10 37^ & =0.8 10 4 5 & =6.4 ~N aligned Force responsible for downward motion =m g aligned & =1 10 37^ & =1 10 3 5 aligned =6 ~N As, downward force < limiting friction. So, frictional force = downward force. Hence, tension in string is zero.