n order to walk across the floor, you push backwards on the floor with your foot. Newton's Third Law says that the reaction force to this action force is "floor pushes you forward" (Action: You push floor backwards. Reaction: floor pushes you forward.) So, when you walk, it is the floor that pushes you along!
We can find the force by using the following formula; N = ma + mg Fa = ma = 76 x 1.2 = 91.2 Fg = mg = 76 x 9.8 = 744.8 N = 91.2 + 744.8 = 836 So, the force is 836 N.
