Four acrobats of mass 70 kilogram, 68 kilogram, 62 kilogram, and 55 kilogram form a human tower, with each acrobat standing on the shoulders of another acrobat. The 70 kilogram acrobat is at the bottom of the tower.
(a) Obtain the normal force acting on the 70-kg acrobat?
(b) If the area of each of the 70-kg acrobat's shoes is 430 cm2, find what average pressure (not including atmospheric pressure) does the column of acrobats exert on the floor?
(c) Find will the pressure be the same if a different acrobat is on the bottom?