# H3 Time Dilation, Length Contraction

9 Questions | Total Attempts: 111  Settings  Questions on time dilation and length contraction. After a few definitions, then an ongoing question in many parts.

• 1.
Define proper time.
• 2.
Define proper length
• 3.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light.  What is the value to 2dp of the Lorentz factor (gamma)
• A.

1.2

• B.

2.3

• C.

3.4

• D.

4.5

• 4.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light.  How long will this journey take according to the observer on the earth?
• A.

1111s

• B.

2222s

• C.

3333s

• D.

4444s

• 5.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light.  Who measures proper time for the journey?
• A.

Observer on the earth

• B.

Pilot of space ship

• C.

Another independent observer

• D.

The cosmic time keeper

• 6.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light. Calculate the time taken for the voyage according to the pilot of the space ship.
• A.

1111s

• B.

966s

• C.

822s

• D.

733s

• E.

544s

• 7.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light. Who measures the proper length of the journey from Earth to Planet X?
• A.

Pilot on space ship

• B.

Observer on the Earth

• C.

Independent observer

• D.

Great Galactic time measurer

• 8.
A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth.  It travels at 90% of the speed of light. Calculate the distnace from Earth to Planet X according to the travelling spaceship?
• A.

6E11m

• B.

3.31E11m

• C.

2.61E11m

• D.

1.42E11m

• E.

1.21E11m

• 9.
Are there any parts of this where you had difficulties, and you need to go over in class?
Related Topics Back to top