College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 1

A meterstick moving at 0.900 c relative to the Earth's surface approaches an observer at rest with respect to the Earth's surface. (a) What is the meterstick's length as measured by the observer (b) Qualitatively, how would the answer to part (a) change if the observer started running toward the meterstick