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E = mgh (energi potensial) = Joule
E = kg. m/s² . m
E = kgm²s⁻²
Joule = kgm²s⁻²
No.8
Batangpertama = 360
Batang kedua = 70
Batang ketiga = 5,5
Maka pembacaannya adalah = 360 + 70 + 5,5 = 435,5 gram
No.9
Energi kinetik: E = 1/2 mv²
Dimensi
m = kg = M
v = m/s = LT⁻¹
Maka: E = kg (m/s)²
E = M (LT⁻¹)²
E = ML²T⁻²