Showing how mechanical energy conservation works can be tricky. Here are some reasons why:

1. Friction in the Real World: Friction and air resistance can waste energy. This makes it hard to see how energy is really conserved.

2. Measuring Energy: Figuring out how much potential and kinetic energy there is can be tough, especially in messy or busy situations.

3. Perfect Conditions: Many tests are done under perfect conditions, which almost never happen in real life.

Solutions:

• Work in controlled settings to reduce friction.
• Use accurate tools to measure energy.
• Create simulations that show perfect scenarios to help improve understanding.