How much energy is required to accelerate a golf ball of mass 0.046 kg initially at rest to a speed of 0.75c?

Thank you for the opportunity to help you with your question!

beta = 0.75

gamma = 1/sqrt(1-beta)^2 = 1.51186

Ke = (gamma-1)*mc^2 = 0.51186*0.046*9*10^16 =

2.11 x10^15

answer is 4)

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