Lesson 6- Pressure

Question 1

List the two ways that Pressure can change, and provide an example of each.

Answer 1

1. The presaure in the air changes with altitude -the greater the altitude,the greater the pressure.
   Example: When traveling on a plane our ears pop due to the change in pressure around us
2. The pressure in fluids change with depth. - The greater the depth of the water the greater the pressure Example. The weight of water in the upper part of a simming pool presses down on the water in the lower part of the pool causing the pressure to be much stronger

Question 2

Explain what a hydraulics system and pneumatics system is. Provide an example of each.

Answer 2

A Hudrawlic System is a system that uses a liquid under pressure to transmit force and do work.
Example: A hoist used to lift a car

A pneumatics system uses gas( usually air) under pressure to transmit a force to do work
Example: Air pump

Question 3

What is the formula used for calculating Pressure?

Answer 3

P= F/A
Measured in Pa or N/m2