Two blocks of mass M kg and 2,5kg respectively are connected by a light, inextensible string. the string runs over a light ,frictionless pulley. the coefficient of static friction is 0,2. calculate the tension in the string. calculate the minimum value of M that will prevent the blocks from moving . the block of unknown mass M is now replaced with a block of mass 5kg. the 2,5kg block now accelerates downwards. the coefficient of kinetic friction between 5kg and surface is 0,15. calculate the magnitude of the acceleration of 5kg block ​