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1. |
Let FG be the gravitational force, FD be the drag force and FB be the buoyant force. Which of the following best describes the relation between these forces when a sphere falls into a fluid with terminal velocity? |
A. | F<sub>G</sub> + F<sub>D</sub> = F<sub>B</sub> |
B. | F<sub>G</sub> + 2F<sub>B</sub> = F<sub>D</sub> |
C. | 2F<sub>B</sub> + F<sub>D</sub> = F<sub>G</sub> |
D. | F<sub>B</sub> + F<sub>D</sub> = F<sub>G</sub> |
Answer» E. | |