
usaha dan energi
Presentation
•
Physics
•
1st Grade
•
Easy
Reski Ainunnisa
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8 Slides • 1 Question
1
usaha dan energi
By Reski Ainunnisa
2
Konsep Usaha dan Energi
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Energi yang disalurkan oleh gaya pada sebuah benda sehingga benda tersebut mengalami perpindahan.
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Pengertian Usaha
4
Persamaan Usaha (W)
W = F . s
Dimana:
W = Usaha (Joule)
F = Gaya (Newton)
s = Perpindahan
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W = F . s cos θ
Dimana:
W = Usaha (Joule)
F = Gaya (Newton)
s = Perpindahan
θ = Besar sudut
5
Multiple Choice
Manakah bentuk persamaan usaha yang tepat?
W= s.F
W = F.s
W= F/s
W = s/F
6
W = F . s
W = 250 N . 100 m
W = 25000 Joule
Penyelesaian:
F = 250 N
s = 100 m
Ditanyakan:
W..........?
Diketahui:
Contoh Soal:
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7
Konsep Usaha Berdasarkan arah pergerakannya
Terdapat 3 konsep usaha berdasarkan arah geraknya
Usaha bernilai positif
Usaha bernilai negatif
Usaha sama dengan nol
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Energi merupakan kemampuan untuk melakukan usaha.
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Energi
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energi yang dimiiki benda pada ketinggian tertentu.
Ep = mgh
Energi Potensial
energi yang dimiiki pada saat benda bergerak.
Ek = 1/2 mv2
Energi Kinetik
Jenis-jenis Energi
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usaha dan energi
By Reski Ainunnisa
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