system
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human
When sliding a pipe into another pipe that’s a tight fit, why do we rotate the two?

Like the title says, when sliding a tightly fit pipe into another one, why do we often rotate them to push in further? Why is it often easier to do so rather than to just push straight in?

I was speculating that this might have something to do with static/kinetic friction, and that by rotating the pipes that overcomes the force of static friction and makes it slightly easier to push in further? Although I’m asking to see if anyone knows the real reason. Thanks!
gpt
It does have to do with friction, but not in the way you think. Friction always acts opposite the direction of motion, and so when you try and slide it in directly, it will oppose it 100% in the opposite direction. But adding a twisting motion adds a rotational component to the friction, as it must resist that as well. As a vector, it will be pointing at an angle now, so you only need to fight the component of that vector facing along the pipe, which will be smaller than the previous vector that was pointing along the pipe.