Click here to purchase the entire book in PDF format.

1A Pascal is a unit of pressure (Unless, of course, you live in the United States and insist on using a different measurement system than the rest of us.). How much pressure? Well, if there was no gravity and you had a 1 kg block of steel and you pushed it with a pressure of 1 Pa, the block would accelerate at 1 meter per second per second. So, if you pushed for 1 second and stopped, the block would be moving 1 m/s. If you pushed for 2 seconds it would be moving 2 m/s and so on... This is one way to think of a Pascal. The other definition is that 1 Pascal equals the force of 1 Newton (abbreviated N) distributed over 1 square metre. The problem with this definition is that we have to worry about what a Newton is... Not surprisingly, a Newton is the amount of force it takes to accelerate 1 kg at a rate of 1 meter per second squared.