Forces opposing rotary motion other than Inertia

In summary, the forces opposing rotary motion include bearing friction, air resistance, and magnetic forces in certain situations. The calculation of these forces depends on the size, shape, and load of the rotating shaft.
  • #1
SireeshaCh
1
0
Hello Gurus,

What are the forces opposing rotary motion? And how to calculate them?
For eg., if we have a shaft rotating about it's own axis, are there any other forces that oppose this motion other than bearing friction, like air resistance or some other forces. And how to calculate these forces if we know the mass of the shaft.

Thanks in advance for your valuable answers.

Regards,
Sireesha Ch
 
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  • #2
:welcome:

Air resistance depends on the size and shape of the shaft, not its mass.

Other forces might be magnetic, such as in an electric motor. A motor spins somthing (called the load) that opposes rotation. Magnetic forces push the rotation. In an electric generator, things are reversed. Something mechanical, like a turbine rotates the shaft and magnetic forces oppose it.
 

Related to Forces opposing rotary motion other than Inertia

1. What is friction and how does it oppose rotary motion?

Friction is a force that resists the relative motion between two surfaces in contact. In rotary motion, friction acts in the opposite direction of the motion, creating resistance and slowing down the rotation.

2. How does air resistance affect rotary motion?

Air resistance, also known as drag, is a force that opposes the motion of an object through air. In rotary motion, air resistance creates a resistance torque that opposes the rotation and can slow down or stop the object's motion.

3. What is centripetal force and how does it oppose rotary motion?

Centripetal force is a force that acts towards the center of a curved path, keeping an object moving in a circular motion. In rotary motion, centripetal force opposes the outward centrifugal force and helps to maintain the object's rotational motion.

4. How does the shape and weight distribution of an object affect the forces opposing its rotary motion?

The shape and weight distribution of an object can affect the forces opposing its rotary motion. Objects with a larger surface area or uneven weight distribution will experience more air resistance and friction, resulting in a greater opposition to rotary motion.

5. How can we reduce the forces opposing rotary motion?

To reduce the forces opposing rotary motion, we can minimize friction by using lubricants or smoother surfaces, reduce air resistance by streamlining the object, and evenly distribute the weight of the object to minimize any imbalances. We can also increase the strength of the centripetal force to counteract any opposing forces.

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