Principle of the Lever

 

In the lever the moment P acts opposite to that of work W. It means that force F tends to rotate the lever in one direction which the weight W rotates in opposite direction. If the magnitude of these moments acting in opposite direction is equal, then the lever will be in equilibrium. It means that:

 

Moment of P = Moment of W

 

Mechanical Advantage:

 

We know that according to Principle of Lever:

 

Moment of P = Moment of W

 

Force * Force Arm = Weight * Weight Arm

 

P * AB = WX BC

 

AB/BC = W/P

 

Hence,

MA = W/P = AB/BC = Weight Arm/ Force Arm

 

In previous articles, I have sorted out the differences and dwelled in detail on the advantages and disadvantages of paper and e-books; speech synthesizers and audio books. He touched upon the expediency, convenience and difficulties arising in the process of using some modern technologies that give significant prospects for intellectual development and improvement. In other articles I have ridiculed the Old Believers of the “paper cult”.