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m= 3 kg
h= 14 m
v= 6 m/s
g= 10 m/s²
Dit:
Em=..?
Penye:
Em= Ep+Ek
Ep= m.g.h
Ep= 3×10×14
Ep= 420 Joule
Ek= 1/2.m.v²
Ek= 1/2×3×6²
Ek= 1,5×36
Ek= 54 Joule
Em= 420+54
Em= 474 Joule