The pendulum in the diagram below swings from position A to B.

Question

If we don’t consider friction, what happens to the total mechanical energy as the pendulum swings from position A to position B?

(1 point)
Responses

It declines
It declines

It is not conserved
It is not conserved

It becomes greater.
It becomes greater.

It remains the same

Answer 1

The correct response is:

It remains the same.

In an ideal pendulum where friction and air resistance are not considered, the total mechanical energy (the sum of kinetic and potential energy) remains constant throughout the swing. As the pendulum moves from position A (higher potential energy, lower kinetic energy) to position B (lower potential energy, higher kinetic energy), the total mechanical energy is conserved.