Clock Spring Torque

John_tawil

I'm winding up a clock spring from the outside and release from the inside. Is the input torque = to the output torque?

How would i go about setting up this problem

K^2

Has to be. Imagine that you are just holding the wound spring from inside and outside. If the two torques don't cancel each other out, there is a net torque on the spring. If there is net torque, it has angular acceleration. But you are holding the spring, so it's not accelerating. Therefore, the two torques are equal.

John_tawil

THank you

sophiecentaur

Quote by K^2

Has to be. Imagine that you are just holding the wound spring from inside and outside. If the two torques don't cancel each other out, there is a net torque on the spring. If there is net torque, it has angular acceleration. But you are holding the spring, so it's not accelerating. Therefore, the two torques are equal.

I just love those Null Arguments. Bomb proof and take care of all counter intuitive worries.

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John_tawil	Clock Spring Torque Tweet I'm winding up a clock spring from the outside and release from the inside. Is the input torque = to the output torque? How would i go about setting up this problem

K^2 Recognitions: Science Advisor	Has to be. Imagine that you are just holding the wound spring from inside and outside. If the two torques don't cancel each other out, there is a net torque on the spring. If there is net torque, it has angular acceleration. But you are holding the spring, so it's not accelerating. Therefore, the two torques are equal.