Sebuah benda bergerak dengan kecepatan 20 m/s dan energi kinetik yang dimiliki gaya 1.625 Joule, hitunglah massa benda tersebut!

Sebuah benda bergerak dengan kecepatan 20 m/s dan energi kinetik yang dimiliki gaya 1.625 Joule, hitunglah massa benda tersebut!

Jawaban yang benar adalah 8,125 kg

Energi kinetik adalah energi yang disebabkan oleh gerak suatu benda yang memiliki massa/berat.
Energi kinetik dirumuskan:
Ek = ½ × m × v²
dimana:
Ek = energi kinetik b(Joule)
m = massa (kg)
v = kecepatan (m/s)

Diketahui:
v = 20 m/s
Ek = 1.625 J
Ditanya:
m = ….
Jawab:
Ek = ½ × m × v²
1.625 = ½ × m × 20²
1.625 = ½ × m × 400
1.625 = m × 200
m = 1.625/200
m = 8,125 kg

Jadi, massa benda tersebut adalah 8,125 kg

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