Jawaban:
m = 2,5 kg
h = 50 m
g = 10 m/s²
A. v = 0 h = 50 m
Em = Ep + Ek = Ep + 0 = Ep = mgh = 2,5 x 10 x 50 = 1250 J (tepat)
B. v = 10 m/s
Em = Ep + Ek
1250 = Ep + 1/2 mv² = Ep + 1/2 x 2,5 x 10² = Ep + 125
Ep = 1250-125 = 1125 J
C. v = 20 m/s
1250 = Ep + 1/2 mv² = Ep + 1/2 x 2,5 x 20² = Ep + 500
Ep = 1250-500 = 750 J (tepat)
D. h = 0 v = 3,62 m/s
Em = 0 + Ek
Em = 1/2 mv² = 1/2 x 2,5 x 31,62² = 1249,8 J ( Em seharusnya tetap 1250 J)
jawab C 1 dan 3
*maaf bila tak benar
*biasakan cari jawaban lain utk dibandingkan
Penjelasan:
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Jawaban:
m = 2,5 kg
h = 50 m
g = 10 m/s²
A. v = 0 h = 50 m
Em = Ep + Ek = Ep + 0 = Ep = mgh = 2,5 x 10 x 50 = 1250 J (tepat)
B. v = 10 m/s
Em = Ep + Ek
1250 = Ep + 1/2 mv² = Ep + 1/2 x 2,5 x 10² = Ep + 125
Ep = 1250-125 = 1125 J
C. v = 20 m/s
Em = Ep + Ek
1250 = Ep + 1/2 mv² = Ep + 1/2 x 2,5 x 20² = Ep + 500
Ep = 1250-500 = 750 J (tepat)
D. h = 0 v = 3,62 m/s
Em = Ep + Ek
Em = 0 + Ek
Em = 1/2 mv² = 1/2 x 2,5 x 31,62² = 1249,8 J ( Em seharusnya tetap 1250 J)
jawab C 1 dan 3
*maaf bila tak benar
*biasakan cari jawaban lain utk dibandingkan
Penjelasan: