Part A Three identical blocks connected by ideal (massless) strings are being pulled along a horizontal frictionless surface by a horizontal force F. (Figure 1) The magnitude of the tension in What is the magnitude I" of the force? the string between blocks B and C is 7 = 3.00 N . Assume that each block has mass m = 0.400 Kg . Express your answer numerically in newtons. View Available Hint(s) IVO POO ? F= N Submit Figure