Fig. 4 shows a block of mass 4m kg and a particle of mass mkg connected by a light inextensible string passing over a smooth pulley. The block is on a horizontal table, and the particle hangs freely. The part
of the string between the pulley and the block is horizontal. The block slides towards the pulley and the
particle descends. In this motion, the friction force between the table and the block is žmg N.
4m kg
mkg
Fig. 4
Find expressions for
• the acceleration of the system,
• the tension in the string.
Your solution: