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**Problem**: A spaceship passes an Earth-bound observer at a speed v. The observer on Earth measures the ship to be 300 m long, but an astronaut on the ship would measure it to be 400 m long. What is the speed of the ship, v?

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A spaceship passes an Earth-bound observer at a speed v. The observer on Earth measures the ship to be 300 m long, but an astronaut on the ship would measure it to be 400 m long. What is the speed of the ship, v?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Consequences of Relativity concept. You can view video lessons to learn Consequences of Relativity Or if you need more Consequences of Relativity practice, you can also practice Consequences of Relativity practice problems .