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Hello everyone! Today we are going to talk about friction. Friction is a force that happens between

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two objects when they touch and you try to move one over the other one. For example, I have this

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table that is soft and this car. If I push the car you can see how it goes very fast because this

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surface is very very plain and soft but what happens if we do it over this tower

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that is a little bit rougher than the table okay we put the car we push it with

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the same force and you can see how it stops here because this surface

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is rougher and it makes the wheel just go slower and slower till the car stops.

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We can find this force also in the daily life. For example, this is a

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normal sock, you can see it's a normal one, and this one are the ones that my

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kids use when we are at home and you can see these small spots made of plastic

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that are thought to avoid slip and slide when we are walking okay with this one you can just

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slip and fall, sorry, but with this one you won't, because you are like stuck to the floor,

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okay, and I hope you understood this, if you didn't just ask me by email and I will look

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for a way to explain this better, okay, bye bye.