A 50 kg ballet dancer standing flat-footed on one foot exerts a pressure of 33,500 Pa on the floor. What is the area of her foot (in m2)? If the ballet dancer in the previous question stands on her toe (area 0.00213 m2), what pressure (in Pa) does she exert on the floor?
Kinetic Theory of Gas
The Kinetic Theory of gases is a classical model of gases, according to which gases are composed of molecules/particles that are in random motion. While undergoing this random motion, kinetic energy in molecules can assume random velocity across all directions. It also says that the constituent particles/molecules undergo elastic collision, which means that the total kinetic energy remains constant before and after the collision. The average kinetic energy of the particles also determines the pressure of the gas.
P-V Diagram
A P-V diagram is a very important tool of the branch of physics known as thermodynamics, which is used to analyze the working and hence the efficiency of thermodynamic engines. As the name suggests, it is used to measure the changes in pressure (P) and volume (V) corresponding to the thermodynamic system under study. The P-V diagram is used as an indicator diagram to control the given thermodynamic system.
- A 50 kg ballet dancer standing flat-footed on one foot exerts a pressure of 33,500 Pa on the floor. What is the area of her foot (in m2)?
- If the ballet dancer in the previous question stands on her toe (area 0.00213 m2), what pressure (in Pa) does she exert on the floor?
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