What is the correct formula for of the weight w of an object? assume that its mass is m, the magnitude of its acceleration is a, and the local acceleration due to gravity is g?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?