The next two questions concerns explanations written by other students. Evaluate each explanation for accuracy. Sentences are numbered so you can comment on each sentence.

First explanation to evaluate:

(1) After the kick there is a contact push/pull interaction between the ball and ground. (2) There is a transfer of energy from the ground to the ball. (3) As a result, the thermal energies of both the ground and ball increase, while the kinetic energy of the ball decreases. (4) Because the kinetic energy of the ball decreases, 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: This explanation is not accurate because sentence #2 is wrong (choice C). Energy is not transferred from the ground to the ball; it is transferred from the ball to the ground.