Energy 7 



As volume is the product of length, breadth, 

 and thickness, we have 



Mass = Length X Breadth X Thickness X Density. 



Inertia is a term used to express the fact 

 that matter persists in the condition of 

 motion or rest in which it is until that con- 

 dition is changed by the action of energy. It 

 is also used to represent the resistance which 

 the mass of matter offers to energy. 



Force is that factor of energy which serves 

 as the immediate agency in giving motion to 

 matter by overcoming its resistance. It is 

 what we measure in pounds, grams, or any 

 other unit representing strain or tension in 

 matter. Other factors of energy are Velocity 

 and Time. 



A common formula used to represent the 

 quantity of energy employed in doing work 

 and also the amount of work performed by 

 the energy is K = FVT, in which F is the 

 force which acts to overcome resistance, V 

 is the velocity of the force, and T is the 

 length of time that the force F continues to 



