7. If an object's potential energy is converted into kinetic energy, which of the following happ A) The object's speed decreases. B) The object's speed increases. C) The object becomes heavier. D) The object's mechanical energy is destroyed.

When an object's potential energy is converted into kinetic energy, the object's speed increases. This is because potential energy, which is stored energy due to an object's position or configuration, is transformed into kinetic energy, which is the energy of motion. As a result, the object moves faster.<br /><br />Therefore, the correct answer is:<br /><br />B) The object's speed increases.