If an object falls twice as far, how do you think the energy acquired changes? halves
doesn't change
doubles
quadruples

Doubles

Explanation:

Before starting to fall, the object will have energy in the form of potential energy. This will be the energy that will be transformed into kinetic energy, once the object starts its fall. And the potential energy that the object had before starting to fall, will be equal to the kinetic energy acquired during the fall. The potential energy is given by:

Where m is the mass of the object, g is the gravity, and h is the distance to the floor. As you can see, The potential energy is proportional to the height of the fall, so if this height doubles, the potential energy and therefore, the kinetic energy acquired will doubles.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6