In the system shown above, there is no friction anywhere. When the big box was pushed with just the right force so that it has an acceleration ag, it is possible that two blocks with masses m and m stay at rest. Masses are: T = m1 : 2 kg, m2 = mi Note: This problem can be solved either in ground's or box's reference frame. Neither frame has any noticeable advantage over the other. (a) Find the acceleration ag for which this happens. m/s (b) Find the normal force on the block with mass m. = = M = 1 kg. Take g n = N (c) Find the normal force on the block with mass m. n1 N (d) Find the tension in the string. N = : 10 m/s.