M = M0*К, где К = 1/sqrt(1-(v/c)^2)
v/c = 2.4/3 = 0.8
K = 1/sqrt(1-0.64) = 1/0.6=5/3
M = 48*5/3=80кг
M = M0*К, где К = 1/sqrt(1-(v/c)^2)
v/c = 2.4/3 = 0.8
K = 1/sqrt(1-0.64) = 1/0.6=5/3
M = 48*5/3=80кг