Puberty

UOI..Energy and force

Energy

What is Energy


Energy has a few important properties. For one, energy is always "conserved" — it cannot be created or destroyed. It can, however, be transferred between objects or systems by the interactions of forces. For example, the energy in vegetables is transferred to the people who digest them. 

Force

What is force


Force is an action that causes a free object with nonzero, finite mass to accelerate, relative to a non-accelerating frame of reference. Examples of force include the thrust of a rocket engine, the impetus that causes a car to speed up when you step on the accelerator, and the pull of gravity on your body. Force is the effect that produces the phenomenon of weight for objects with , finite mass.