question_answer 32)

  A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is (a)                                                (b)                           (c)                              (d)

Answer:

  (b) Given, initial velocity = u, height = h and a = g (acceleration due to gravity) At the highest point, final velocity becomes zero i.e., v = 0 From, third equation of motion,                                                                                                                                                         Here, we have used negative sign because the body is moving against the gravity.