Sebuah benda yang bergerak dengan kelajuan tetap 36 km/jam mempunyai energi kinetik 2,5 kj. tentukan berat massa benda tersebut?
aisyahussnul
36 km/jam = 10 m/s Ek = 1/2 m v2 2500 Joule = 1/2 m 100 2500= 50m m = 50 w = m g w = 50 x 10 = 500 N
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nurulkhumaerah
Dik: v= 36 km/jam = 100 m/s Ek= 2,5 kj = 2500 joule dit = m? peny = ek = 1/2 x m x v² 2500 = 1/2 x m x 100² 2500 = 1/2 x m x 10000 2500 = 5000 x m m = 2500/5000 m = 0,5 kg
Ek = 1/2 m v2
2500 Joule = 1/2 m 100
2500= 50m
m = 50
w = m g
w = 50 x 10 = 500 N
Ek= 2,5 kj = 2500 joule
dit = m?
peny =
ek = 1/2 x m x v²
2500 = 1/2 x m x 100²
2500 = 1/2 x m x 10000
2500 = 5000 x m
m = 2500/5000
m = 0,5 kg