A spacecrafts lenght is 300 meters in its own frame. If it moves at V=4/5c relat

Question

A spacecrafts lenght is 300 meters in its own frame. If it moves at V=4/5c relative to the earth or sun what is its lenght in the earth or suns frame?

a) 180 meters

b) 240 meters

c) 300 meters

d) 375 meters

3) 500 meters

In the previous proble the lenght of the spacecraft is measured by someone laying down and picking up a meter stick placing the zero end at the previous one meter end. The number of times he lays down the meter stick become the lenght in meters.

In his own frame ( the spacecrafts frame) how many time does he lay down the meter stick?

a)180

b)240

c)300

d)375

e)500

Explanation / Answer

i think that 1) 375 2) 500

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