Megan is sitting (at rest) at the top of a slide that is inclined 25o with respect to the horizontal. After traveling 5.0 m (the length of the slide), Megan's speed at the bottom of the slide is 5.3 m/s. Assume that friction is not negligible in this situation. If Megan's mass is 25 kg, how much does the thermal energy of the system increase during Megan's trip down the slide?