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The following six problems are about the following situation: A spaceship at rest on the earth...

The following six problems are about the following situation: A spaceship at rest on the earth has a length of 120 m and a mass of 16,000 kg. Then the spaceship begins to move away from the earth at 3/4 the speed of light.

14)  If the spaceship sends out a second ship away from the earth at what observers ON THE SPACESHIP think is 1/2 the speed of light, how fast do the observers ON EARTH think the second ship is moving?

0.47c

0.78c

0.91c

1.00c

1.25c

15)  If the spaceship sends out a second ship toward the earth at what observers ON THE SPACESHIP think is 9/10 the speed of light, how fast do the observers ON EARTH think the second ship is moving?

-0.15c

-0.31c

-0.46c

-0.65c

-1.00c

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