College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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**Question:**

A satellite is held in orbit by a 1,000-N gravitational force. Each time the satellite completes an orbit of circumference 80,000 km, the work done on it by gravity is:

- a. \( 8.0 \times 10^8 \, \text{J} \)
- b. \( 8.0 \times 10^{11} \, \text{J} \)
- c. 0
- d. \( 1.0 \times 10^{11} \, \text{J} \)
- e. \( 1.0 \times 10^8 \, \text{J} \)

**Explanation:**

When considering work done by gravity on a satellite in a circular orbit, it's important to note that gravitational force acts perpendicular to the direction of the satellite's motion. This means that no work is done by gravity as the satellite moves along its orbital path. Therefore, the work done on it by gravity is option c. 0.
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Transcribed Image Text:**Question:** A satellite is held in orbit by a 1,000-N gravitational force. Each time the satellite completes an orbit of circumference 80,000 km, the work done on it by gravity is: - a. \( 8.0 \times 10^8 \, \text{J} \) - b. \( 8.0 \times 10^{11} \, \text{J} \) - c. 0 - d. \( 1.0 \times 10^{11} \, \text{J} \) - e. \( 1.0 \times 10^8 \, \text{J} \) **Explanation:** When considering work done by gravity on a satellite in a circular orbit, it's important to note that gravitational force acts perpendicular to the direction of the satellite's motion. This means that no work is done by gravity as the satellite moves along its orbital path. Therefore, the work done on it by gravity is option c. 0.
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