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v = 4 m/s
Ek =
Ek =
v= 4 m/s
Dit: EK...?
Peny: EK= 1/2 m.v² ⇒ EK= 1/2 x 0,5 x 4² ⇒ EK= 0,25 x 16 ⇒ EK= 4 Joule