- #1
ZedCar
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Homework Statement
A star is located 4.2 light years from Earth.
At what constant velocity must a spacecraft travel from Earth if it is to reach the star in 3.0 years time?
Homework Equations
I've been working on this for a couple of days, but I'm not entirely sure which equation to use.
Also, the fact that the distance is given in light years. Generally formulas require the distance input in metres (I'm in UK), so what would I input into a formula for distance? If I input 4.2 it may indicate 4.2 metres!
Thank you