Ablacksmith quenches a horseshoe by dropping the red-hot iron object into a bucket of cold water. how will the blacksmith know that the horseshoe is no longer transferring energy to the water?
a) the water will stop steaming.
b) all of the water will boil away.
c) the horseshoe will stop glowing red.
d) the temperature of the water will start to drop after climbing.

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy