How do you calculate pressure using force and area?

Thread starter dinhjeffrey
Start date Apr 24, 2011
Tags

Homework Physics Physics homework Pressure

In summary, pressure is the amount of force applied per unit area and is typically measured in units of Pascals (Pa) or Newtons per square meter (N/m<sup>2</sup>). It is calculated by dividing the force applied by the area over which it is applied using the formula P = F/A. Pressure is affected by factors such as force, area, depth, temperature, and altitude. It is also related to other physical properties through various laws, such as Boyle's Law and Charles's Law. In real life, pressure is used in weather forecasting, scuba diving, cooking, and engineering and design to determine the strength and stability of structures.

Apr 24, 2011

dinhjeffrey

Homework Statement

http://img26.imageshack.us/f/1113001.jpg/

#16

Homework Equations

P=F/A

The Attempt at a Solution

F= 30N
A= πr^2
r= .01m
A = .0001π
P=F/A
P= 10^3 Pa
but the answer is E) 10^5 Pa

Physics news on Phys.org

Apr 24, 2011

Andrew Mason

Science Advisor

Homework Helper

What is 30/3.14 x 10^-4?

AM

Apr 24, 2011

dinhjeffrey

95492 = 100,000 = 10^5 - oops miscounted the zeroes thanks lol

1. What is pressure?

Pressure is the amount of force applied per unit area. It is typically measured in units of Pascals (Pa) or Newtons per square meter (N/m²).

2. How is pressure calculated?

Pressure is calculated by dividing the force applied by the area over which it is applied. The formula is: P = F/A, where P is pressure, F is force, and A is area.

3. What factors affect pressure?

Pressure is affected by the force applied, the area over which it is applied, and the depth of the object or substance being measured. Other factors such as temperature and altitude can also affect pressure.

4. How does pressure relate to other physical properties?

Pressure is related to other physical properties such as volume and temperature through various laws, such as Boyle's Law and Charles's Law. These laws describe the relationship between pressure, volume, and temperature in gases.

5. How is pressure used in real life?

Pressure is used in many real-life applications, including weather forecasting, scuba diving, and even cooking. It is also important in engineering and design, as it helps determine the strength and stability of structures.