Why is it easier to snap a longer rod than a shorter one?

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It is easier to snap a longer rod than a shorter one due to the increased torque applied, as longer rods have a greater distance between the points of force application. This results in a larger bending moment, making them more susceptible to breaking under stress. Additionally, lateral loads can weaken materials over time, as seen with rattlesnake rattles, where repeated impacts contribute to fatigue. The relationship between length and lateral load suggests that longer rods experience greater stress. Overall, leverage plays a crucial role in the mechanics of rod failure.
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I'm a complete newbie to physics, just wanted an answer to something.

Why is it easier to snap a longer rod compared to that of a smaller rod of the same material?

Is it just down to greater torque applied with respect to the longer rod?

I have tried to google it but it doesn't come up with anything with any substance, maybe i need to improve on my google'ing!

Also for example with a rattlesnakes rattle, after many years sometimes it snaps (possibly from hitting it against things etc). But am i right in saying that it would be the lateral load in the motion of the rattle that causes it to get weaker also? and does the lateral load typically increase with length?
 
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