# AP Physics 2 : Principles of Special Relativity

## Example Questions

### Example Question #1 : Principles Of Special Relativity

Determine the observed length of a  rod traveling along it's long axis at  in relation to an observer.

Explanation:

Using the formula for length contraction:

Where is the rest length,

is the velocity of the object

is the speed of light

is the observed length

Plugging in values

### Example Question #1 : Principles Of Special Relativity

Determine the observed length of a  rod traveling along it's long axis at  in relation to an observer.

None of these

Explanation:

Use the following equation:

Where is the rest length,

is the velocity of the object

is the speed of light

is the observed length

Plugging in values

### Example Question #3 : Principles Of Special Relativity

long rod is traveling at  in relationship to an observer along it's long axis. Determine the observed length.

None of these

Explanation:

Using

Plugging in values

### Example Question #2 : Principles Of Special Relativity

tall rocket is traveling at  in relationship to an observer along it's long axis. Determine the observed length.

None of these