After stating a hypothesis, what is the next step that a physicist is most likely to take in answering a question?
A. Planning and performing an experiment to answer the question
B. Reading journal articles to discover the best answer
C. Observing the conclusions drawn by other scientists with similar
questions
D. Identifying the theory that provides the best explanation of the
answer

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force