Sadly, after giving all the necessary data, you forgot to ask the question. Here are some general considerations that jump out when we play with that data:
<em>For the first object:</em> The object's weight is (mass) x (gravity) = 2 x 9.8 = 19.6 newtons The force needed to lift it at a steady speed is 19.6 newtons. The potential energy it gains every time it rises 1 meter is 19.6 joules. If it's rising at 2 meters per second, then it's gaining 39.2 joules of potential energy per second. The machine that's lifting it is providing 39.2 watts of lifting power. The object's kinetic energy is 1/2 (mass) (speed)² = 1/2(2)(4) = 4 joules.
<em>For the second object:</em> The object's weight is (mass) x (gravity) = 4 x 9.8 = 39.2 newtons The force needed to lift it at a steady speed is 39.2 newtons. The potential energy it gains every time it rises 1 meter is 39.2 joules. If it's rising at 3 meters per second, then it's gaining 117.6 joules of potential energy per second. The machine that's lifting it is providing 117.6 watts of lifting power. The object's kinetic energy is 1/2 (mass) (speed)² = 1/2(4)(9) = 18 joules.
If you go back and find out what the question is, there's a good chance that you might find the answer here, or something that can lead you to it.
