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Va = 1/2.Vb
EKa : EKb
= (1/2)(Ma)(Va^2) : (1/2)(Mb)(Vb^2)
= (1/2)(3Mb)((1/2Vb)^2) : (1/2)(Mb)(Vb^2)
= (1/2)(3Mb)((1/4Vb^2) : (1/2)(Mb)(Vb^2)
(angka setengah setelah dikuadratkan jadi 1/4)
(kemudia coret yang sama menjadi)
= (3)(1/4)
= 3/4
jawabnnya a. 3:4