When the pendulum shown below swings from point A to point B, what happens to its total mechanical energy (ignoring friction)?

(1 point)
Responses

Total mechanical energy goes down.
Total mechanical energy goes down.

Total mechanical energy stays the same.
Total mechanical energy stays the same.

Total mechanical energy is not conserved.
Total mechanical energy is not conserved.

Total mechanical energy goes up.

Total mechanical energy stays the same.

When the pendulum swings from point A to point B, its total mechanical energy stays the same.