Part 3: Work with your team to maximize the transfer of gravitational potential energy (GPE) to elastic potential energy (EPE) while keeping Barbie safe. Aim for the longest drop without Barbie touching the ground. Remember to wear safety glasses. Once you achieve your best and safest jump, record a video, and upload it below. Enter your first name in the “Subject” field. Use the QR code provided to simplify the upload process.