Even though we have found an earth sized planet around the nearest star Alpha Centauri B, we're not even close to getting there. To see this let's think about the duration of a flight to Alpha Centauri B, which is about 4×1016 meters away. Imagine a rocket that accelerates at 0.1g for the first two years of its travel before it runs out of fuel and coasts for the rest of the trip at constant velocity. How long does the total trip take in years?

Question

(1 year = 3.15 x 10^7 sec)

Answer 1

v=at= 0.1g•3.15•10⁷=3.087•10⁷ m/s,
s=at²/2=0.1g•(3.15•10⁷)²/2=4.86•10¹⁴m,
s₁=d-s=4•10¹⁶-4.86•10¹⁴=3.95•10¹⁶ m,
t₁=s₁/v = 3.95•10¹⁶/3.087•10⁷=1.28•10⁹s =40.6 yr.

Answer 2

wrong answer...
correct answer is 22 years (approx)
thank you for answering

Answer 3

21.6