Answer
9000 J.
Work Step by Step
The total energy of 10,000 J remains the same.
$$PE + KE = Total \;E$$
$$ 1000 J + KE = 10,000 J$$
$$KE = 10,000 J – 1000 J = 9000 J$$
This situation is discussed on page 118.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.