anonymous
  • anonymous
why it is easier to break an object from its centre?? of example- a karate performer breaks a plank or when a rod is pulled from both sides
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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JamesJ
  • JamesJ
An object like a plank of wood breaks when you can get it bend about a point beyond some critical angle. Now, torque, which makes an object rotate, is proportional to the distance from which the rotation occurs and proportional to the force applied|dw:1327590224737:dw| So in the diagram here rotation occurs at the end where the supports are. Given the force F of the impact of the hand is equal, to maximize the rotation at the supports, the best place to hit the wood is in the middle, as that is where the distance from the points of rotation is maximized for both of them.
anonymous
  • anonymous
hey james how will u apply this in the case of pulling a rod from both ends equally so it breaks from middle??
anonymous
  • anonymous
Its Applies in the same way... Torque is proportional To the Distance... The same applies in the example of a Rod.....

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JamesJ
  • JamesJ
No, the rod is a different case, not related to torque. And rods need not break in the middle. If your interested in this, have a look at ...
JamesJ
  • JamesJ
http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/video-lectures/lecture-26/
anonymous
  • anonymous
i will check

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