
IMPLUS DAN MOMENTUM
Presentation
•
Physics
•
9th - 12th Grade
•
Practice Problem
•
Hard
herlin frans
FREE Resource
5 Slides • 0 Questions
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2
MOMENTUM adalah hasil perkalian antara massa dan kecepatan
MOMENTUM merupakan besaran vektor karena memiliki nilai dan arah.
secara matematis dapat dirumuskan:
P = mv
keterangan:
P = momentum (kg.m/s)
m = massa benda (kg)
v = kecepatan (m/s)
3
Jika mobil bergerak membentuk sudut θ terhadap Truk, maka besar momentum totalnya dinyatakan sebagai berikut:
P=√(P12 + P22 + 2P1P2 COS θ)
jika sebuah mobil memiliki momentum P1, dan sebuah truk memiliki momentum P2, maka kedua momentum dinyatakan sama seperti penjumblahan vektor yaitu:
P = P1 + P2
kecelakan pada mobil
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B. IMPLUS
IMPLUS adalah gaya yang diperlukan untuk menggerakan benda dalam waktu tertentu.
I = FΔt
Keterangan:
I = implus (Ns)
F = gaya (N)
Δt = selang waktu (s)
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dik: m1 = m2 = 10.000 kg
v1 = 24 m/s, v2 = 0
v'1 = v'2 = v'
dit: v'.......?
jawab:
m1v1 + m2v2 = m1v'1 + m2v'2
m1v1 + m2v2 =(m1+m2) = v
(10.000)(24)+(10.000)(0)=(10.000+10.000)v'
240.000= 20.000v'
24=2v'
v' = 24/2 = 12 m/s
Terjadi kecelakaan kereta api dimana sebuah gerbong kereta dengan massa 10.000 kg bergerak dengan laju 24 m/s. gerbong tersebut menabrak gerbong lain yang serupa dan dalam keadaan diam. Akibat tabrakan tersebut, gerbong tersambung menjadi satu. Maka, berapakah kecepatan dari gerbong tersebut!
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