QuestionFigure it thomure 6
In Figure 1, a person uses a pulley to lift a bell. The person pulls down on the rope at a constant speed. Power $P_{1}$ is delvered to the bell and it moves upward at a constant speed. In Figure 2, the person uses a double pulley. The person pulls down on the rope at the same constant speed. The bell again moves upward at a constant speed, but the speed of the bell is half the speed of the bell in Figure 1 . The power delivered to the bell in Figure 2 is $P_{2}$. Which of the following correctly compares $P_{2}$ to $P_{1}$ and provides a valid justification? (A) $P_{2}<P_{1}$, because in Figure 2 the force exerted on the bell is the same but it is moving with less speed than in Figure 1. (B) $P_{2}<P_{1}$, because in Figure 2 the force exerted on the bell is less than in Figure 1. (C) $P_{2}=P_{1}$, because in Figure 2 the speed is half that in Figure 1 , but the force on the bell is twice that in Figure 1. (D) $P_{2}=P_{1}$, because in Figure 2 the person is doing the same amount of work on the bell as in Figure 1.