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Physics

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The kinetic energy of a proton is half its internal energy. What is the proton's speed?

Kinetic energy is (Yu - 1) (mp) (c)^2

= 1/2 (mp) (c)^2

Yu = 1.5



Yu = 1/(square root) 1 - (u/c)^2

1/(square root) 1 - (u/c)^2 = 1.5

u= 0.745c

How do I solve for u? I'm extremely confused on how to do this. I know you square 1/(square root) 1 - (u/c)^2 to both sides esp. 1.5 to get rid of the square root. But up to there I'm confused to how to solve for u

  • Physics - ,

    1/√(1-(u/c)^2) = 3/2
    √(1-(u/c)^2) = 2/3
    (1-(u/c)^2) = 4/9
    (u/c)^2 = 5/9
    u/c = √5/3 = .745
    u = .745c

  • Physics - ,

    thank you

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