Advantages: Rubber grip the pedal, lubricant can loose the rusty screw, Roller can help object to move easily, Disadvantages: Rough surface can wear out shoe sole, Amir injured after fall off the bike, Drill produce loud sound and cause sound pollution,

Effect of Frictional Force

Výsledková tabule/Žebříček

Vizuální styl

Možnosti

Přepnout šablonu

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