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KELAS = 8PELAJARAN = FISIKA
KATEGORI = Usaha dan daya
KATA KUNCI = Gaya, waktu, kecepatan
Nomor 1 :
Diketahui :
F1 = 400 N
F2 = 200 N
s =5 m
Ditanyakan : W ?
Dijawab :
Usaha :
W = (F1-F2) x s
= (400-200) x 5
= 200 x 5
= 1000 J
Nomor 2 :
Diketahui :
F = 5 N
V = 10 m/s
t = 10 s
Ditanyakan : W ?
Dijawab :
W = P x t
= F x v x t
= 5 x 10 x 10
= 500 J