WCLN.Ca 8. Inorder to calculate the efficiency of your track you will need to determine the final speed your car achieves just before it launches into the air. To do this you will work backwards using projectile motion analysis. Create a fully labelled sketch on your type 1 projectile below. Measure the vertical and horizontal displacements (d}r and d ) and mark these measurements directly on your diagram. Diagram of type 1 projectile (label range and height values, along with launch velocity, v,)