Question

Why do you need a referencepoint to determine if an objecthas moved?A. The object will stop moving if you don'tcompare it.B. The object could run into another object.C. Motion is a change in position relative to afixed point.

Answer 1

In Physics, when we measure a specifig magnitude, we need a reference point to compare with. If you wan't to know your position, you have to related to some reference point, otherwise, you won't be able to do it. All this means that motion (movement) is the change of your position in reation to a fixed point, a reference point.

Therefore, the answer is C.