Answer the following statement(s) true (T) or false (F)

1. Since an object’s ends do not move in its rest frame, the events used to mark out an object’s length in that frame do not have to be simultaneous: the distance between them is the object’s rest length whether they are simultaneous or not.

2. An object’s length would be negative in a frame where it travels faster than the speed of light.

3. Suppose an object is in a frame where it is moving at speed and its length is L0 at that speed. If we double the speed then the object’s length is compressed by a factor of two.

4. In the pole and barn problem, the barn never actually encloses the pole in the ground frame.

5. We can define a moving object’s length to be its speed times the time it takes to pass a given point


1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. TRUE

Physics & Space Science

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