A canned-goods dispenser has a vertical column of 10 cans, each having a mass of 1 kg (Figure P7–8). The cans fit loosely in the vertical slot, and the coefficient of friction is 0.2 for all surfaces....

A canned-goods dispenser has a vertical column of 10 cans, each having a mass of 1 kg (Figure P7–8). The cans fit loosely in the vertical slot, and the coefficient of friction is 0.2 for all surfaces. What force P is required to pull the bottom can out?