Question

how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth

Answers

drwls
sqrt[1 -(v/c)^2] = 0.8
1 - (v/c)^2 = 0.64
(v/c)^2 = 0.36
v = 0.6 c

60% of the speed of light would be required.
Joe Mama
Sorry can you explain how you get 0.64? Square rooting both sides? sqrt of 0.8 is 0.89 on the calculator. Please help.
Joe Mama
Nevermind lol.. you squared it.
Joe Mama
Nevermind lol.. you squared it.

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