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

Tabela

Vizuelni stil

Postavke

Promeni šablon

Vrati automatski sačuvano: ?