The question is in the photo below

3. When an object falls from rest, the distance it has travelled is directly proportional to the square of the time it has travelled. An object dropped from rest travels 19.6 m in 2 seconds. 146 = (a) Show that d = 4.9t2 is the model for calculating distance in terms of time. [2 marks] ( b ) How far will the object travel in 3 seconds? [1 mark] (c) How long will it take for the object to fall 100 m? Give your answer to 4 significant figures. [2 marks ] (workspace on next page)