### All AP Physics 2 Resources

## 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.

**Possible Answers:**

**Correct answer:**

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 #2 : Principles Of Special Relativity

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

**Possible Answers:**

None of these

**Correct answer:**

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

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

**Possible Answers:**

None of these

**Correct answer:**

Using

Plugging in values

### Example Question #4 : Principles Of Special Relativity

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

**Possible Answers:**

None of these

**Correct answer:**

Using

Plugging in values