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m= 50 kg
Ek= 625 Joule
Dit:
v=..?
Penye:
Ek= 1/2.m.v²
1/2.m.v²= Ek
1/2×50×v²= 625
25×v²= 625
v²= 625/25
v²= 25
v= √25
v= 5 m/s
v =