7. Spaceship A leaves earth at speed v = 0.4c. Two days later spaceship B leaves earth at v = 0.7c travelling in the same direction. (a) When and where do the spaceships meet in the earth frame? Use units of c-day. (b) When and where do the meet in A's frame? Use units of c-day. (b) What does A measure for the speed (as a fraction of c) of B? Hint - the answer is not 0.3c. Remember v = d/t. Use LT events approach.
7. Spaceship A leaves earth at speed v = 0.4c. Two days later spaceship B leaves earth at v = 0.7c travelling in the same direction. (a) When and where do the spaceships meet in the earth frame? Use units of c-day. (b) When and where do the meet in A's frame? Use units of c-day. (b) What does A measure for the speed (as a fraction of c) of B? Hint - the answer is not 0.3c. Remember v = d/t. Use LT events approach.
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Transcribed Image Text:7.
Spaceship A leaves earth at speed v=0.4c. Two days later spaceship B leaves earth at v =
0.7c travelling in the same direction. (a) When and where do the spaceships meet in the
earth frame? Use units of c-day. (b) When and where do the meet in A's frame? Use units
of c-day. (b) What does A measure for the speed (as a fraction of c) of B? Hint - the answer
is not 0.3c. Remember v = d/t. Use LT events approach.
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