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 is not conserved
It is not conserved

It becomes greater.
It becomes greater.

It remains the same
It remains the same

It declines

Answer 1

The correct response is:

It remains the same.

In a frictionless system, the total mechanical energy (the sum of potential and kinetic energy) is conserved as the pendulum swings. As it moves from position A to position B, potential energy is converted into kinetic energy, but the total mechanical energy itself remains constant.