Answer
Please see the work below.
Work Step by Step
We know that:
$\Delta K=K_f-K_i=W$
This can be rearranged as
$K_f=K_i+W$
We plug in the known values to obtain:
$K_f=3.00J+6.00J=9.00J$
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.