Can torque only be caused by a force couple?

AI Thread Summary
Torque can be generated by a single force acting at a distance from a pivot point, not just by a force couple. A force couple consists of two equal and opposite forces that create rotation without translating the object. Examples of torque from a single force include opening a door by pushing on the handle or using a wrench to turn a bolt. Understanding torque involves recognizing that it is the product of force and the distance from the pivot point, which can occur with one or more forces. The discussion emphasizes the need for clarity on the concept of torque and its relation to force couples.
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Is it necessary that torque can only be caused by a force couple? If not, then can you provide examples?
 
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This looks like homework.

You need to show some work on the problem before we can help you.
 
What do you understand torque is?
 
A "force couple" implies that there are multiple forces acting upon an object but no net linear force on an object. Is this what you mean by "force couple"?
 
Thread 'Variable mass system : water sprayed into a moving container'
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