Question

Problem 26.09 15 of 16 Constants Part A A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.40 m long and 1.75 m high. What will be its length at rest? Πνα ΑΣφ m Submit Request Answer Part B What will be its height at rest? Πνα ΑΣφ Request Answer Submit

Part C: How many seconds elapsed on your friend's watch when 15.0 s passed on yours?

Part D: How fast did you appear to be traveling according to your friend?

Part E: How many seconds elapsed on your watch when she saw 15.0 s pass on hers?

Answer 1

considering expression for length contractiom

L = Lo sqrt ( 1 - v^2/ c^2)

4.4 = Lo sqrt ( 1 - 0.77^2)

Lo = 6.896 m

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b) height remians constant = 1.75 m

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c)

considering time dilation

to = t sqrt (1 - v^2/c^2)

to = 15* sqrt ( 1- 0.77^2)

to = 9.57 s

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d)

relative velocity = 0.77 c

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e)

same as (c)

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comment in case any doubt, will reply for sure.. goodluck