question_answer

  Prove that if a body is thrown vertically upward, the time of ascent is equal to the time of descent.        

Answer:

                  The upward-motion is given below                  ?(i)(1) and the downward motion                                     (1) As the body falls back to the earth with the same velocity it was thrown vertically upwards.                              ..(ii) From Eqs. (i) and (ii), we have Time of ascent = Time of descent           (1)