Using the graph above, how fast must Velma move past Mort if he is to observe her spaceship's length to be reduced by 50%?
A) about 25% of lightspeed
B) about 85% of lightspeed
C) 70% of lightspeed
D) 50% of lightspeed
E) about 95% of lightspeed

Question

Quizplus · Accepted Answer

The graph shows that the length of Velma's spaceship is reduced by 50% when she moves at about 85% of the speed of light.

Using the Graph Above, How Fast Must Velma Move Past