Start Swinging

Classical Mechanics Level 1

Suppose that you are initially at rest at the lowest point of a swing. Then, is it possible for you to start swinging without pushing the ground or being pushed by someone or something (like wind)?

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Pranshu Gaba by Pranshu Gaba , 22, India

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2 solutions

Kaushik Chandra
May 27, 2017

You can shift the centre of gravity of your body by changing the configuration of your body parts.

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But just changing the configuration of body parts is not "swinging", and where does the angular momentum about the hinge come from? We cannot exert torque on ourselves, and the hinge has no lever, for a torque from gravitation, one must first start swinging so the hinge does not come in line with the same. @Terry Chadwick

Satvik Golechha - 4 years ago

Doing disturb the line of action of gravity force(mg) and tension in rope we can generate some kind of torque about hinge??

Rohit Sharma - 4 years ago

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Yes, we can generate a torque about hinge. Actually, you can observe this phenomenon by swinging .

Kaushik Chandra - 4 years ago
Adil Shaikh
Jun 16, 2017

By shifting your center of gravity, we might create tension on the rope

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