Rein23rein23viz
Answered

1.Which has the smoothest surface?________ How far did the toy car slide in it?_____________
2.Which has the roughest surface?______ How far did the toy car slide in it?__________
3.Explain how the differences in surface of objects affect friction and movement?___________​



PLEASE HELP KO I NEED IT AND ILL PICK ONE OF YOU AS BRAINLEST​

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Airishcelestinegalleviz

Answer:

1.Now materials scientists from the Autonomous University of Madrid led by Amadeo Vázquez de Parga have combined silicon and metal to make what they say is the smoothest surface ever made. They made the near-perfect mirror by coating a thin layer of lead onto a silicon surface

2.sandpaper

Glass is the smoothest surface and sandpaper the roughest.

3.Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.