Imagine your lab group was carefully pointing the motion sensor at the same leve

Question

Imagine your lab group was carefully pointing the motion sensor at the same level on the chest of the person walking towards you. You collect the data, tabulate it and make various graphs. You also notice that another lab group was rather sloppy. Their sensor was aimed at various locations of the body as their walker is moving about. Their walker claims that he has walked steadily towards the sensor, just like yours. Which of the following statements about the graphs that the other lab group made are most likely true, in your opinion?

a. Only their velocity versus time graph will have wiggles.

b. Only their position versus time graph will have wiggles.

c. Only their acceleration versus time graph will have wiggles.

d. All of their graphs will have wiggles.

e. All of their graphs will be just as good as yours.

Explanation / Answer

b. Only their position versus time graph will have wiggles.

the position of the various points on the body of the person as focused by the sensor is different for each point.

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