Hello, i'm a high school physics student and i have trouble solving this dynamics problem related to tension and stuff... heres the question 3 blocks of masses 10kg, 5kg and 3kg are connected by a light string that pass over a frictionless pulley as shown. the acceleration of the 5kg block is 2ms^-2 to the left, and the surfaces are rough. find (a) the tension in each string and (b) the coefficient of the kinetic friction between the blocks and the surfaces. The diagram is attached to my post. I drew a rough one in paint. Please help me guys! I've got to hand in this assignment tomorrow and i cant do this question =(.