Three blocks are placed in contact on a horizontal frictionless surface. a constant force of magnitude f is applied to the box of mass m. there is friction between the surfaces of blocks 2m and 3m (μs = 0.26, μk = 0.15) so the three blocks accelerated together to the right.

what is the acceleration of the blocks? (you may assume block 3m does not slide or fall off block 2m.)

what is the maximum force f that can be applied, before the 3m block slides off?

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)