Question

OBJECT 12. Consider an object fully submersed in fluid as shown in the figure. Based on our discussion of Archimedes' Principle, which of the conditions below would cause the object to experience a downward acceleration? a. Pfluid > Pobject b. Pfluid = Pobject C. Pfluid Pobject d. None of the above; the object's acceleration is not dependent on relative density between the fluid and the object. 13. A friend of yours, who also happens to be a professional ballerina, hears that you are taking an introductory physics course and decides to call you up to pose a physics question. In which case would she exert the greatest pressure on the ground? a. Standing with both feet flat on the ground. b. Standing with one foot flat on the ground. c. Standing on the toes of one foot. d. Lying down on the ground. e. All of the above yield the same pressure.

Answer 1

12. Based on the Archimedes principle, the object sinks with an acceleration downward, when the density of the object is greater than the density of the fluid.

Answer: (c)

13. The less the area of contact, the more is the pressure.

Answer: (c). Standing on the toes of one foot.