During the contact push/pull interaction between the hand and the cart kinetic energy is transferred between them. The type of energy that changes in the two interacting objects is always the same as the type of energy that is transferred, so this means that the kinetic energy of the hand decreases while the kinetic energy of the cart increases. Since the cart was at rest to start with, this increase of kinetic energy means that it starts to move. Which criterion (accuracy, completeness, or clarity and logical reasoning) is not satisfied by this explanation? Briefly explain why you think so.
Version #2
Describe the situation using a diagram:
Contact Push/Pull Interaction
4
Write the narrative:
During the contact push/pull interaction between the hand and the cart kinetic energy is transferred between them. The type of energy that changes in the two interacting objects is always the same as the type of energy that is transferred, so this means that the kinetic energy of the hand decreases while the kinetic energy of the cart increases. Since the cart was at rest to start with, this increase of kinetic energy means that it starts to move.
Which criterion (accuracy, completeness, or clarity and logical reasoning) is not satisfied by this explanation? Briefly explain why you think so.

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