A chair is pushed across the floor, and then let go. The chair comes to a very quick stop. A previous student wrote an explanation narrative for why the chair slows down after being let go. Read her evaluation, and then evaluate it for accuracy.

(1) There is a contact push/pull interaction between the chair and floor. (2) During the interaction, energy is transferred from the chair to the floor. (3) The kinetic energy of the chair decreases while its thermal energy increases, as well as the thermal energy of the floor. (4) Because the thermal energy of the chair increases, it slows down.

This explanation is

A) Accurate as written.

B) Not accurate because sentence #1 is not correct.

C) Not accurate because sentence #2 is not correct.

D) Not accurate because sentence #3 is not correct.

E) Not accurate because sentence #4 is not correct.

F) Not accurate because more than one sentence is not correct.

Feedback: The explanation is not accurate because sentence #4 is wrong (choice E). The chair does not slow down because its thermal energy increases; it shows down because its kinetic energy decreases.