Friction would be present at the contact points between the nails and the wood, as well as between the wood surfaces that are in contact with each other around the nails. This friction helps to hold the pieces of wood together and provide stability to the joint.
If there was no friction, the pieces of wood nailed together would not be able to stay in place. Without friction, there would be nothing to prevent the pieces from sliding and slipping out of position. Therefore, the structure would likely fall apart.
two (wink wink) blubbery surfaces rubbing against each other if you know what I mean
There is friction, but comparatively little unless the glass is very clean. Because the glass is not touching over the majority of its surface. Instead trapped air is between the two plates. This massively reduces the coefficient of effective friction. Normally, if glass is clean so that the surfaces can touch, they will "stick together" as they are so flat and friction is so high - ask anyone working with glazing glass - they try never to let two panes touch except at an edge.
Two pieces of sandpaper have more friction than two pieces of notebook paper because sandpaper is specifically designed to have a rough surface that generates more friction when rubbed against another surface. The rough surface of sandpaper creates more resistance and grip compared to the smoother surface of notebook paper.
Rubbing two sticks together creates friction, which generates heat that can ignite the wood. Metals are better conductors of heat, so when two metal pieces rub together, the heat generated is quickly dissipated, making it difficult to generate enough heat to start a fire.
If there was no friction, the pieces of wood nailed together would not be able to stay in place. Without friction, there would be nothing to prevent the pieces from sliding and slipping out of position. Therefore, the structure would likely fall apart.
friction is what makes it hard to rub two pieces of sand paper together
A ripping bar is primarly used for extracting nails from used lumber, or to separate pieces of wood that are nailed together.
Friction always wastes energy and heat is produced
Rubing two pieces of wood together rapidly and consistently can cause enough friction to heat the wood to the point of ignition. However these days I doubt if there are many aboriginals that would light a fire that way. a lighter is much easier.
two (wink wink) blubbery surfaces rubbing against each other if you know what I mean
One way to join two thin pieces of wood at a 90-degree angle is to use a technique called a miter joint. This involves cutting each piece of wood at a 45-degree angle so that when they are put together, they form a right angle. The pieces can then be glued or nailed together to create a strong and secure joint.
You want high friction so that the energy lost to friction is converted to heat energy. The greater the friction, the greater the amount of energy coverted to heat (or sparks). So low friction means you will have to rub your two pieces of wood (or whatever you're using) together for much longer. Good luck!
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Two pieces of sandpaper have more friction than two pieces of notebook paper because sandpaper is specifically designed to have a rough surface that generates more friction when rubbed against another surface. The rough surface of sandpaper creates more resistance and grip compared to the smoother surface of notebook paper.
There is friction, but comparatively little unless the glass is very clean. Because the glass is not touching over the majority of its surface. Instead trapped air is between the two plates. This massively reduces the coefficient of effective friction. Normally, if glass is clean so that the surfaces can touch, they will "stick together" as they are so flat and friction is so high - ask anyone working with glazing glass - they try never to let two panes touch except at an edge.
Rubing two pieces of wood together rapidly and consistently can cause enough friction to heat the wood to the point of ignition. However these days I doubt if there are many aboriginals that would light a fire that way. a lighter is much easier.