Two masses rest on a frictionless surface. You are given a spring scale and are asked to measure the acceleration of the masses for a given range of applied horizontal forces. You obtain an acceleration-vs.-force graph for each object. Unfortunately, the units on the spring scale are missing! However, you happen to know that the mass of object 2 is 0.250 kg. Knowing this, what is the mass of object 1? Round your answer to the nearest thousandths place. 16 14 . N ' ' 5H 5.21 acceleration (mfsAZ) oc () [) l 2 3 =1 5 6 xi on 9 l[)