Hang the given object with an unknown mass to the same Spring. Measure the initial and final lengths of the spring before and after attaching the mass. Calculate the value of the unknown mass. Show all your calculations with exact units. The initial length of the Spring Final length of the Spring- Mass of the given object- = /4 6. Newton's second law experiment was performed using the standard procedure, and the graph is plotted using the measured data given below. Calculate the acceleration of the moving cart experimentally and theoretically ?. (Mass of the moving cart is 211g and the hanging mass is 11g) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 velocity (m/s) 0 0.5 Velocity-time 1 time (s) y = 0.2068x-0.0288 R = 0.9965 1.5. 2