Qualitatively explain how you would expect the potential energy to change as a glider slides down an inclined air track, where friction is negligible.
For a given mass, the potential energy
varies directly with the vertical ht.
If the ver. ht is reduced by one-half,
the potential energy will be reduced by
1/2. When the bottom of the incline is reached, the potential energy will be zero. PE = mgh.