3. The first colonists on Mars conduct a physics experiment by dropping a small mass (from rest) and recording its displacement at regular time intervals. This data is shown below. d (m) t(s) 0.30 0.40 0.60 0.60 1.20 0.80 1.80 1.00 2.70 1.20 (2 marks) a) Plot a graph of displacement versus time squared and draw the best fit straight line. 5.0 4.0 3.0 d(m) 2.0 10 1.0 0 0 0.5 1(s) 10 1.0 1.5 b) Determine the slope of the line. (2 marks) c) Based on this experiment, what is the acceleration due to gravity on Mars? (1 mark)