4. Now looking at your graph and ignoring the individual data points, find and circle two points where your line passes through intersections of the grid lines. Using the coordinates of these two points, calculate the slope. This will be your spring constant in units of N/m. 5. Now we'll find the mass of the two unknown mass cylinders that are provided. Since we now know the spring constant, we can work backwards to find the mass. Rearranging Hooke's Law, we have: 7? = 20? And using the weight in place of force, we get: N?W = 20? 7? = ?W?W? M?0? M? = Multiply the spring constant you found above by the displacement, then divide that by gravity to get the mass of our unknown cylinders. Fill in the data table below, being careful to use standard SI units of meters and kilograms