Tuesday, September 25,2018 e) [5 pts] The multi-exposure photo at right shows a

Question

Tuesday, September 25,2018 e) [5 pts] The multi-exposure photo at right shows a person jumping off of a cliff into the water. The time duration between exposures is constant. Which of the following statements is true about the person during the entire jump (while in the air)? Circle ALL that apply... A) His speed is approximately constant. B) His velocity is approximately constant. C) If we ignore air drag, he can be treated as a functionally isolated system. D) There is at least one point where the magnitude of his y-velocity is greater than the magnitude of his r-velocity. E) The location of his center of mass is not changing.

Explanation / Answer

D)

His y-velocity is greater than x -velocity at a point.

Because, his x velocity doesn't change but y-velocity keeps on increasing in downwards direction. This is also visible from the picture. As his vertical displacement is increasing rapidly but not horizontal displacement.

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