Question

the image shows a pendulum that is released from rest at point a. shari tells her friend that no energy transformation occurs as the pendulum swings between point b and point d. what is the best response that sharis friend could make? she could agree with shari because the pendulum is at the same height and would have the same gravitational potential energy at both positions. she could agree with shari because the pendulum has the same amount of mechanical energy throughout its swing. she could disagree with shari because the pendulum converts kinetic energy into gravitational potential energy, then back into kinetic energy. she could disagree with shari because the pendulum converts gravitational potential energy into kinetic energy, then back into gravitational potential energy.

Explanation:

As the pendulum swings between points B and D, at the higher - position (B and D), it has more gravitational potential energy and less kinetic energy. At the lowest - point (C), it has more kinetic energy and less gravitational potential energy. Energy transformation between gravitational potential energy and kinetic energy occurs.

Answer:

She could disagree with Shari because the pendulum converts gravitational potential energy into kinetic energy, then back into gravitational potential energy.