The SI unit of energy is J = kg m2 s-2; that of speed v is m s-1 and of acceleration a is m s -2. Which of then formulae for kinetic energy (k) given below can you rule out on the basis of dimensional arguments (m stand for the mass of the body)? (a) K = m2v3 (b) K = (1/2) mv2 (c) K = ma (d) K = (3/16) mv2 (e) K = (1/2) mv2 + ma


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