Pulley Systems! HELP!! 1. The problem statement, all variables and given/known data The three blocks in the diagram are released from rest and accelerate at the rate of 1.5m/s^2. What is the magnitude of the frictional force on the block that slides horizontally? i dont know why my picture isnt attaching but basically the image is of a table and on it is 1 block(4kg), on the left dangling off the table with a pulley is another block (2kg), and the same on the right side except with a mass of 4kg 2. Relevant equations Ff=MFn f=ma 3. The attempt at a solution so...i am very confused, i believe that im trying to find the frictional force of the block on the table i thought that the force of gravity and normal force cancel...and so what's left is the tension from the left and right, as well as the frictional force from the right... the total force of the system is equal to the (total mass)(acceleration), which is 15N now what? what do i do?!