A small block of mass m is placed on a platform that has a

Last updated: 6/21/2023

A small block of mass m is placed on a platform that has a rectangular protrusion The block is connected to one end of a light inextensible cord that passes over an ideal pulley fixed on the corner of the rectangular protrusion and final y attached to the wall Segment of the cord between the pulley and the wall is horizontal and is at a height h above the top face of the platform as shown in the figure The platform is on a horizontal frictionless floor Coefficient of friction between the block and top face of platform is 4 The platform is pulled away from the wall so that it moves with a constant velocity D Find the force F pulling the platform when segment of the cord between the block and the pulley makes angle with the horizontal Denote acceleration of free fall by g and assume that the block does not leave the platform