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Ek=mV²/2
Ek-energia kinetyczna
m-masa
V-prędkość
Ek=70kg*(5m/s)²/2=70kg*25m²/s²/2=875J
2) 86st.F
Ek=0,5mV2 2 to potega
V=5m/s
m=50 kg
Ek=?
Ek=0,5*50kg*(5m/s)2
Ek=625J
ZAD2
C Farenhaita=32 + 9/5 * C Celciusza
C Farenhaita= 32+9/5*30C
C Farenhaita= 86