Relativity Unit 1: Quiz 04

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Relativity Unit 1: Quiz 04

Anastajia is standing next to a train track and a train carrying Beowulf passes her at a speed of 25 m/s. Beowulf walks from the front of the train to the back of the train at a speed of 4m/s. (Assume that the train's direction coincides with the x-axis.)

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What is the speed of Beowulf as measured in a reference frame that is affixed to the train? *

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-4 m/s

0 m/s

4 m/s

21 m/s

25 m/s

29 m/s

What is the speed of Beowulf as measured in Anastajia's reference frame? *

0 points

-4 m/s

0 m/s

4 m/s

21 m/s

25 m/s

29 m/s

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