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Verified answer
Dik :m=1 kg
v1=20 m/s
v2=10 m/s
Dit :
W=...?
Peny :
W=ΔEk
W=1/2 m (v2²-v1²)
W=1/2 1 (10²-20²)
W=1/2 (100-400)
W=1/2 (-300)
W=-150 Joule
∴ Panas yang timbul akibat gesekan adalah sebesar 150 Joule
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