question_answer 42)

                  Which of the diagrams shown in Fig. most closely shows the variation in kinetic energy of the earth as it moves once around the sun in its elliptical orbit?                 (a)       (b)                 (c)     (d)                  

Answer:

                  (a) K.E. of the moving earth varies from maximum to minimum and vice-versa as it moves in all elliptical orbit. K.E of the earth is never zero.