Force exerted over a small time and big time frame

AI Thread Summary
When an object is struck quickly, it experiences a higher peak contact force compared to a slow application of force, even though the total force required to break the object remains the same. The concept of impulse, which is the product of force and time, indicates that less impulse may be needed when striking quickly due to the rapid application of force. The faster impact results in more energy being absorbed by the object's acceleration, leading to a greater peak force at the moment of contact. This means that while the breaking force is constant, the dynamics of how that force is applied differ significantly between fast and slow impacts. Understanding these principles clarifies the relationship between speed, force, and the breaking point of materials.
Howlin
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Hi

Why is it that if you hit an object fast it requires less force to break it than if you hit the object slow and applied pressure to it?
 
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If you hit it fast, the forces are higher.
 
So you are saying if I hit a block of wood or glass really fast, it takes the same force to break it than if i use a force press and it slowly applies force to the block of wood or glass?
 
No, he said HIGHER.

However, it may take less impulse (force times time).
 
russ_watters said:
No, he said HIGHER.

However, it may take less impulse (force times time).

But why would it be higher, shouldn't it be just the same force required to break the boards or glass, no matter if it is hit fast or slow?
 
When you apply a force, the object moves - even when holding it rigidly, it bends. The faster you apply the force, the more of the force that is absorbed by the acceleration of the object.
 
Howlin said:
But why would it be higher, shouldn't it be just the same force required to break the boards or glass, no matter if it is hit fast or slow?
The peak contact force is higher not the force required to break .
 

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