Rotating heavy masses x100 of you're own?

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In summary, the conversation discusses the concept of rotational motion and how it is affected by friction. It is mentioned that when a large object is suspended and has low friction, it is easier to rotate it with a small force over time. The example of a small motor rotating a large pendulum is given to illustrate this concept. It is also suggested that suspending a heavy object and applying a small force can eventually lead to rotational motion due to the absence of friction. The conversation ends with the idea that a small motor can rotate a heavy mass if the object is suspended equally and has low mechanical friction.
  • #1
Miyz
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Hello everyone!


A few days ago I was in my university I walked in my engineering building and I saw a HUDGE pendulum! Very big and so heavy! It was hung from the celling wall, not sure of its mass though... Anyhow! I was wondering why is it when we stabilize the mass of an object equally we as humans very weak and small in mass can rotate it easily!

I never thought of it properly, but really if I was able to lift up a truck! and hang it from both ends top/bottom and make it semi-frictionless(extremely low friction) I can rotate it easily with not much effort!

This idea came in mind when I saw a huge ball being rotated by a small motor x100 its size in a building!

I mean is the motor only rotating it? Does it feel any resistance of the weight? Or that can be solved?


Thanks!

Regards,
Miyz,
 
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  • #2
You wouldn't actually be able to rotate the truck that easily. However, it's true that if you applied constant force to the hanging truck for some time, could rotate it. You mentioned the reason for this in your post: there's little to no friction resisting the motion of the truck. When you try to roll the truck across the ground, it'll be much harder because the kinetic energy you transfer to the truck is quickly taken back out of the truck by the friction in the wheels and axles of the truck. When the truck is suspended, there's much less friction, allowing the truck to better maintain the kinetic energy you're transferring to it.

The motor for the pendulum doesn't need to be very big because it can constantly apply a small force which adds up to a large momentum in the pendulum over time, and if the pendulum doesn't produce much friction, it will maintain that momentum / kinetic energy for a long time.
 
  • #3
Nessdude14 said:
You wouldn't actually be able to rotate the truck that easily. However, it's true that if you applied constant force to the hanging truck for some time, could rotate it. You mentioned the reason for this in your post: there's little to no friction resisting the motion of the truck. When you try to roll the truck across the ground, it'll be much harder because the kinetic energy you transfer to the truck is quickly taken back out of the truck by the friction in the wheels and axles of the truck. When the truck is suspended, there's much less friction, allowing the truck to better maintain the kinetic energy you're transferring to it.

The motor for the pendulum doesn't need to be very big because it can constantly apply a small force which adds up to a large momentum in the pendulum over time, and if the pendulum doesn't produce much friction, it will maintain that momentum / kinetic energy for a long time.


Thanks!

If you suspend a large mass and apply a small force over time eventually it will speed up and rotate and become easier to move :approve:

In a sense if I lift up a very very very heavy object x100 of my own mass. If I applied some force it will eventually add up and move based on my force.

Again a small motor can rotate a heavy mass that is x100 its size if suspend equally and has low mechanical friction as possibile!
 

FAQ: Rotating heavy masses x100 of you're own?

What is the potential danger of rotating heavy masses x100 of your own?

Rotating heavy masses x100 of your own can be extremely dangerous as it can cause serious injuries or even death. The centrifugal force generated by the rotation can be strong enough to throw you off balance and cause you to fall or become entangled in the rotating mass.

How does rotating heavy masses x100 of your own affect your body?

Rotating heavy masses x100 of your own can put a tremendous amount of strain on your body, particularly your muscles and joints. The force of the rotation can cause muscle tears, joint dislocations, and other injuries. It can also lead to fatigue and exhaustion.

What precautions should be taken when rotating heavy masses x100 of your own?

When rotating heavy masses x100 of your own, it is important to take necessary precautions to ensure safety. This includes wearing protective gear, such as gloves and safety glasses, and making sure the area is clear of any obstacles. It is also recommended to have a spotter or assistant to help with the rotation and to stop the rotation if necessary.

Can rotating heavy masses x100 of your own have any benefits?

While rotating heavy masses x100 of your own can be dangerous, it can also have some benefits. It can be a great way to build strength and improve coordination and balance. It can also be used for training and rehabilitation purposes in sports and physical therapy.

What is the maximum weight that can be safely rotated x100 of your own?

There is no specific maximum weight that can be safely rotated x100 of your own as it depends on various factors such as your physical abilities, the type of rotation, and the equipment used. It is important to start with a manageable weight and gradually increase it, while always being aware of your body's limitations.

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