Questions like the HSC 2017 exam

Due to copyright the actual exam questions can not be published here.

Please refer to the 2017 HSC Physics exam for the published questions.

like question 20

The length of a spaceship is measured by an observer to be 0.8 m as the spaceship passes with a velocity of 0.6c.

At what velocity would the spaceship be moving relative to the observer if its measured length was 0.6m?

  1. 0.5c
  2. 0.6c
  3. 0.7c
  4. 0.8c