Question

35. (a) Derive an expression for kinetic energy possessed by an object of mass m, moving with velocity v Also state the SI unit of kinetic energy

(b) A ball of mass 400 g rolls on a ground with uniform speed of 25 m/s. Find the kinetic energy possessed by it​

Answer 1

Answer Expert Verified Derivation: Let us consider an object of mass " m " which is at rest on smooth horizontal plane. Let a Force , F acts on the object and let the object from rest moves from point A to point B and covers a displacement S. ... The WORK Done appears as kinetic energy of the body. Let the workdone on the object causes a change in its velocity from u to V and let a be the acceleration. we know that the kinetic energy of a body moving with certain velocity is equal to workdone on the object to acquire that velocity from rest.