Two spaceships are observed from earth to be approaching eachother along a strai

Question

Two spaceships are observed from earth to be approaching eachother along a straight line. Ship A moves at0.40c relative to the earth observer, while shipB moves at 0.50c relative to the sameobserver. What speed does the captain of ship Areport for the speed of ship B?

a. 0.85c
b. 0.75c
c. 0.95c
d. 0.10c
e. 0.99c Two spaceships are observed from earth to be approaching eachother along a straight line. Ship A moves at0.40c relative to the earth observer, while shipB moves at 0.50c relative to the sameobserver. What speed does the captain of ship Areport for the speed of ship B? 0.85c 0.75c 0.95c 0.10c 0.99c

Explanation / Answer

Vb/a=Vb-Va=.5c-.4c=.1c

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