Chapter 34, Problem 18TE

A police officer pulls you over speeding. He tells you that his radar tracked you moving at a rate of $45\text{mph}$ away from his parked police car. Were you really speeding away from him or was the space between the two of you simply expanding?

To determine

Whether a police officer pulls you over for speeding or the space between the officer and you expand.

Answer to Problem 18TE

If the police officer pulled a person over for speeding away as he saw in radar then, a person was speeding away from the officer.

Explanation of Solution

The expansion of space is possible when there is less or no gravitational force. Gravitational force helps the Earth by keeping all the objects attracted to the center of the Earth. Thus, there is no expansion of space on Earth.

Expansion of space happens on the large scale say, galaxies. Therefore, it is not possible on Earth.

It is evident from the above discussion that if a police officer pulls a person over for speeding when a police officer tracked a person using radar at the speed of $45\text{mph}$ away from the police’s parked car, then a person was speeding and it is not the expansion of space between me and the police officer.

Conclusion:

Therefore, if the police officer pulled a person over for speeding away as he saw in radar then, a person was speeding away from the officer.