Question

Dik:energi kinetik=320 joule
kecepatan=8 m/s
dit:Massa...?

Answer 1

Ek= 1/2 x m x v x v
320 joul = 1/2 x m x 8 m/s x 8 m/s
320 joul= 1/2 x m x 64 m/s
m = 320 joul x 2 : 64 m/s
m = 640 joul : 64 m/s
m = 10 kg