Five acrobats form a human tower with the following masses (in kg): 45, 52, 55, 47, 58. Each acrobat stands on the shoulders of another acrobat in a decreasing mass arrangement where largest mass being at the bottom. Calculate the normal force on the acrobat on the second bottom. If the area of each of the 52.0-kg acrobat’s shoes is 397 cm2 , what average pressure (not including the atmospheric pressure) does the column of acrobats exert on the shoulders of the next acrobat?
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
1. Five acrobats form a human tower with the following masses (in kg): 45, 52, 55, 47, 58. Each acrobat stands on the shoulders of another acrobat in a decreasing mass arrangement where largest mass being at the bottom.
- Calculate the normal force on the acrobat on the second bottom.
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If the area of each of the 52.0-kg acrobat’s shoes is 397 cm2 , what average pressure (not including the atmospheric pressure) does the column of acrobats exert on the shoulders of the next acrobat?
2. Given tungsten, steel, rubber, and aluminum, rank in decreasing manner by the amount of fractional increase in length under increasing tensile stress.
3. A cable used to lift heavy materials can resist breaking even under a load of 1 meganewtons. The steel cable must support twice that load for safety purposes. Calculate the cross-sectional area the steel cable must have.
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