Nature gives us many life time gifts to survive on earth, those are air, water, food and our physical human body.
Human body can do all types of work by taking of all types of energy like a machine.
In human sense — Eye –for seeing — recognize Light energy in Nature
— Ear — for hearing — recognize sound energy in Nature
— Nose — for smell — recognize wind energy in Nature
— Tongue — for taste — recognize chemical energy in Nature
–Skin — for touch & sense — recognize heat & electrical energy in Nature
In machine Language — It is not the living thing , It will take the some input energy at constant rate and do process (work), finally gives other energy at the same constant rate.
In the process of taking these energies from Nature , we use the term (physical quantity) ‘FORCE’ introduced by sir Isaac Newton. He said that , every physical material body will move with respect to other physical material body, that is 1st body moves the 2nd body.
‘Force’ is an application between two bodies. It is used to convert one energy into another energy, energy into work, work into energy, work into work.
example : A football player(1st body) having energy ‘x’ , now he hit the ball(2nd body) with 20% of ‘x’ energy. it means he transfer the energy into work . now the ball is moving with some kinetic energy.
