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a_sh-v [17]
3 years ago
12

Friction occurs when microscopic hills and valleys stick together true or false

Physics
2 answers:
lara31 [8.8K]3 years ago
7 0

Explanation:

true but not going to copy and paste,

Reika [66]3 years ago
4 0

Answer:

true

Explanation:

Friction occurs because no surface is perfectly smooth. 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.

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3 years ago
The box leaves position x=0x=0 with speed v0v0. The box is slowed by a constant frictional force until it comes to rest at posit
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Answer:

fr = ½ m v₀²/x

Explanation:

This exercise the body must be on a ramp so that a component of the weight is counteracted by the friction force.

The best way to solve this exercise is to use the energy work theorem

            W = ΔK

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We substitute

         - fr x = - ½ m v₀²      

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