Select the option that explains the phrase "all motion is relative, there is no absolute motion."...
Select the option that explains the phrase "all motion is relative, there is no absolute motion."
a) Relative motion refers to motion measured relative to some inertial frame. Absolute motion refers to motion measured in the absolute frame, which is defined to be at rest according to all observers in the universe. However, since the laws of motion are the same in all inertial frames, there is no frame that all observers agree is at rest. Therefore, all motion is relative.
b) Absolute motion refers to motion measured in the absolute frame, which is defined to be at rest according to all observers in the universe. No observers exist in the absolute frame, therefore absolute motion cannot be measured. Consequently, all motion is relative.
c) Absolute motion refers to motion measured in a noninertial frame, where the laws of motion are invalid. Conversely, relative motion refers to motion measured in an inertial frame, where the laws of motion are valid. Therefore, only relative motion exists.
d) The absolute frame is defined to be at rest according to all observers in the universe. There is no such thing as absolute motion because the absolute frame is at rest by definition. Therefore, all motion is relative.
Please explain what makes the correct answer the best choice. Thank you
Homework Answers
Answer :
- (a) Relative motion refers to motion measured relative to some inertial frame. Absolute motion refers to motion measured in the absolute frame, which is defined to be at rest according to all observers in the universe. However, since the laws of motion are the same in all inertial frames, there is no frame that all observers agree is at rest. Therefore, all motion is relative.
This is because laws of motion are same in all inertial frames. Hence no frame is special.
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