L = L0*sqrt[1 - (v/c)^2]
L/L0 = sqrt[1 - (v/c)^2]
(L/L0)^2 = 1 - (v/c)^2
(v/c)^2 = 1 - (L/L0)^2
v/c = sqrt[1 - (L/L0)^2]
In this case L/L0 = 0.4
v/c = sqrt[1 - (0.4)^2]
v/c = sqrt(0.84)
v = 0.9165c
At what speed v will the length of a 1.00 m stick look 40.0% shorter (60.0...
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WILL RATE!
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