Problems are listed in approximate order of difficulty. A single dot (•) indicates straightforward problems involving just one main concept and sometimes requiring no more than substitution of numbers in the appropriate formula. Two dots (••) identify problems that are slightly more challenging and usually involve more than one concept. Three dots (•••) indicate problems that are distinctly more challenging, either because they are intrinsically difficult or involve lengthy calculations. Needless to say, these distinctions are hard to draw and are only approximate.
• 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. [Hint: Consider a coordinate system S′ traveling with rocket A;your problem is then to find the velocity u′ of rocket B relative to S′,knowing its velocity u relative to S.]
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.