Mark is conducting an experiment to show how an object's kinetic energy is affected by its mass and velocity. First, he lets an empty wagon roll down a hill and calculates its kinetic energy. Next, he repeats the experiment after placing a bag of sand in the wagon. Which is the best prediction for the second part of his experiment? (1 point)
• The wagon will have less kinetic energy than when it was empty.
• The wagon will have more kinetic energy than when it was empty.
• The wagon will have the same amount of kinetic energy as when it was empty.
• The wagon will have less velocity than when it was empty.