Effects of Forces

Effects of Forces

1. Mass and Weight

   • 2 different things
   • Mass
     • Amount of substance in an object (kg)
   • Weight
     • Measurement of force on object (N)
   • Weight 10 times bigger
   • On earth 1 kg of mass is equal to 10 N
   • Gravitational Field strength(g)
   • W=mXg

2. Turning Moments and Equilibrium

   • Force applied on object that can turn
   • Distance from pivet x force
   • When in equilibrium moments are balanced

3. Principle of Moments

   • See example on next page

4. Pressure

   • Effect of pressure being excerted over a force
   • P=F A
   • Pressure units are N/m
   • For m the pressure unit is Pa

5. Pressure in Liquids

   • Increase the further down you go
   • See exmaples

6. Pressure in Gases

   • More gas above you higher the pressure
   • Less pressure higher up
   • More pressure lower down
   • See example