A railroad car that is (20 mathrm{~m}) long when at rest passes Rachael, who is standing on

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A railroad car that is $20 \mathrm{~m}$ long when at rest passes Rachael, who is standing on the ground. She records that it takes $120 \mathrm{~ns}$ to go by. How fast is the car moving, as a fraction of $c$ ?

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College Physics A Strategic Approach

ISBN: 9780321907240

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Authors: Randall D. Knight, Brian Jones, Stuart Field

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Question Posted: Apr 03, 2024 07:01 AM

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A railroad car that is (20 mathrm{~m}) long when at rest passes Rachael, who is standing on

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To solve this problem we can use the concept of length contraction from special relativity The lengt...View the full answer

College Physics A Strategic Approach

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