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April 18, 2014

Homework Help: Physics question

Posted by lisa on Sunday, May 10, 2009 at 1:05am.

a friend speeds by you in her spacecraft at a speed of 0.07c in the positive x direction. the spacecraft is measured in yout frame to be 5m long and 1.5 m high.
1) what will be the spacecraft's length and height at rest?
2)how many seconds would you say elapsed on your friend's watch when 30 sec elapsed on yours?
3)how fast are you travelling, according to your friend?
4)how many seconds would she say elapsed on your watch when she saw 30 sec pass on hers?

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