H3 Time Dilation, Length Contraction

9 Questions | By Gboulton | Updated: Mar 21, 2022 | Attempts: 215

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Questions on time dilation and length contraction. After a few definitions, then an ongoing question in many parts.

Questions and Answers

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?