Question

the diagram shows a swinging pendulum. which best explains what happens to the motion of the pendulum due to the law of conservation of energy? the pendulum will slow down and eventually stop moving as the mechanical energy transforms to thermal energy. the pendulum will slow down and eventually stop moving as the mechanical energy disappears. the pendulum will continue moving at the same speed because mechanical energy is created as the pendulum moves. the pendulum will slow down but will not stop moving because some of the mechanical energy is destroyed.

Explanation:

According to the law of conservation of energy, energy cannot be created or destroyed, only transformed. In the case of a swinging pendulum, mechanical energy (kinetic + potential) is gradually transformed into thermal energy due to air - resistance and friction at the pivot point. So the pendulum slows down and eventually stops.

Answer:

The pendulum will slow down and eventually stop moving as the mechanical energy transforms to thermal energy.