The best answer that describes the energy changes during Rebecca's time on the slide is:
potential → mechanical → kinetic
Here's the breakdown of the energy changes:
- Potential Energy: As Rebecca climbs the ladder, she gains gravitational potential energy due to her height above the ground.
- Mechanical Energy: At the top of the slide, she holds both potential energy and some amount of mechanical energy as she prepares to slide down.
- Kinetic Energy: As she slides down the slide, her potential energy is converted into kinetic energy, which increases as she accelerates towards the pool.
So, the correct answer is potential → mechanical → kinetic.