# Exploring the Mysterious Force of a Spinning Motor

• tommyburgey
In summary, the conversation discussed a physics class where the teacher would use a spinning metal motor attached to a metal board. When people held it, it felt strange and would pull them in random directions. The teacher wanted to know the force involved and it was compared to a gyroscope. It was also mentioned that the moment of momentum and resistance play a role in the object's movement. The act of holding the spinning object also affects its movement due to the changing momentum.
tommyburgey
Ages ago in my physics classes my teacher would have a large metal motor that would spin very fast, it was attached to a metal board. When he asked people to hold it it felt really strange and would pull you in apparently random directions. When it didnt spin it was very heavy but when it was spinning it's weight felt as though it changed, but I can't imagine it weighing less on scales. He would always say that he wanted to know what the force was, does anybody know about it or have any links?
(sorry if this was a nooby question)
Thanks, Tom.

Did it feel weird if you were holding it perfectly still or when you tried to move it in any way?

I can't really tell by your description, but it seems like you had a good sized gyroscope in your hands.

Both, I think. It wasn't a gyroscope though as there was only one direction of rotation (it was basically a spinning metal wheel).

This sounds very much like the moment of momentum, L, and the force you mentioned would probably be better described as a resistance towards the force you apply when trying to change the orientation of the disc. It is the same thing that makes bicycles more stable than you'd expect at first glance.

Every bit of the rotating disc is a moving mass and it thus carries a momentum. Collectively these momenta constitute the moment of momentum. Changing the orientation of the disc means chaning the movement of each bit, and thus the moment of momentum, which is conserved in an isolated system. This requires some work.

also, you holding the spinning whatever it was, your hand isn't perfectly steady, so the momentum of the spinning object would move your hand seemingly random because the direction it(the mometum) is moving keeps changing (not sure if its true, but it sounds right =) )

## 1. What is the mysterious force produced by a spinning motor?

The mysterious force produced by a spinning motor is known as centrifugal force. It is the force that pulls objects away from the center of rotation and is caused by the motor's spinning motion.

## 2. How does the spinning motion of a motor create this force?

When a motor spins, it creates a force that acts perpendicular to the direction of motion. This force is known as centrifugal force, and it is caused by the object's inertia trying to keep it moving in a straight line.

## 3. Can this force be measured?

Yes, centrifugal force can be measured using a device called a centrifuge. The centrifuge spins at high speeds, causing objects inside to experience the force, which can then be measured and quantified.

## 4. What are some real-world applications of centrifugal force?

Centrifugal force has many practical applications, such as in washing machines, where it helps to remove water from clothes during the spin cycle. It is also used in amusement park rides, such as roller coasters, to create thrilling sensations for riders.

## 5. Are there any dangers associated with centrifugal force?

Yes, centrifugal force can be dangerous if not properly harnessed or controlled. It can cause objects to fly off in a tangential direction, which can be hazardous to people and equipment. In high-speed rotating machinery, centrifugal force can also cause vibrations and stress on the components, leading to potential malfunctions or failures.

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