As seen from earth (rest frame S) two rockets A and B are approaching in opposite directions, each with speed 0.9c relative to S. Find the velocity of rocket B as measured by the pilot of rocket A.

Which class of lever is a baseball bat? what are the parts of a baseball bat's lever class? describe each one.enter your answer in the space provided.(this question you write your own answer.)i couldn't find the right category, so sorry if this doesn't match.