in terms of 
and 
assuming a massless, frictionless rope-pulley system.
if 
The following device in the figure is called a Tibometer. It is used to measure the coefficient of static friction between the block on the table and the table's surface. The hanging mass is varied to a point where the mass on the table is on the verge of slipping.
in terms of and assuming a massless, frictionless rope-pulley system.
if
