Question

Please help with #24. Please draw out diagrams and list concepts. Be detailed as much as possible.

24. A cylindrical iron plunger is held against the ceiling, and the air is pumped from inside it. A 72-kg person hangs by a rope from the plunger (Figure P10.24). List the quantities that you can determine about the situation and determine them. Make assumptions if necessary Figure P10.24 Flat surface of hollow cylinder 25. You have a rubber pad with a handle attached to it (Figure P10.25). If you press the pad firmly on a smooth table, it is impossible to lift it off the table

Answer 1

weight of the person = W= mg = 72kg*9.8m/s2= 705.60N (downward).......

Quantity 1: weight of the person = W = mg = (72 kg) (9.8 m/s^2) = 705.60 N quantity 2: friction force on the hand by the rope = W = F_r = 705.60 N (upward) quantity 3: friction force on the rope by the hand = F^1_r = F_r = 705.60 N (downward) quantity 4: tension in the string = T T = F^1_r = 705.60 N (upward) quantity 5: force on the cylinder by the rope = F = T = 705.60 N quantity 6: force on the ceiling by the cylinder = 705.60 N (downward)