MCAT Physics Question 36: Answer and Explanation
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Question: 36
6. Given the cycle shown, what is the total work done by the gas during the cycle?
- A. –10 J
- B. 0 J
- C. 7.5 J
- D. 17.5 J
Correct Answer: C
Explanation:
The total work done by the cycle is the sum of the work of paths A, B, and C, or the area within the cycle. Because the area bounded by A, B, and C is a triangle with a base of 5 m3 and a height of 3 Pa, we can calculate the area as 
Clockwise loops tend to do positive work on the environment, while counterclockwise loops do negative work.