Edulodhi

Force can be defined as the physical cause that tends to change the resting position or uniform motion or to change the shape and size of the body. Force = ma M = mass of object a = acceleration of object in most of cases. Units of Force C.G.S.  unit of force is 'dyne' and S.I.  unit of force is 'newton' (N). Also we can consider SI unit of  force is kg/m s -2 Force = ma = kg/m s -2 Absolute  unit of force : If m = 1 unit, a = 1 unit, then the value of F = 1 unit Dyne : It is the force which when acting on a body of mass one gram produces in it an acceleration of 1 cm s -2 in its direction. Newton : It is the force which when acting on a body of mass 1 kg produces in it an acceleration of 1 m s -2 in its direction. Therefore  1 newton (N) = 1 kg × 1 m s -2

Force can be defined as the physical cause that tends to change the resting position or uniform motion or to change the shape and size of the body. Classification of Forces Forces  are classified as  contact  and  non – contact forces . Forces  can be applied on a body by making physical contact or otherwise. Forces  which act on a body through physical contact are contact forces. Forces  which act on a body without making any physical contact with the body are known as non –  contact forces . Based on their nature,  forces  can also be classified as: Mechanical force Magnetic force Gravitational force Electric force Nuclear force Mechanical force To hit a nail into a wall, we use a hammer.  The force exerted by the hammer on the nail rives into the wall.  Thus, in this case, the  force  makes a physical contact and displaces the mail Such a force is called contact force or in this case, it can also be called mechanic...