Friction on a pivot. Graph of motion w/ c.angular accel.

In summary, when an applied friction is applied on a pivot, it will usually cause a rotating object to slow down. However, the effects of friction on rotating objects are not well understood. A graph of angular speed with constant angular acceleration will appear as a straight line, similar to a graph of linear speed with constant acceleration. This is because angular quantities follow the same equations as linear quantities.
  • #1
asz304
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Quick question, if an applied friction is applied on a pivot, will a rotating object slow down? or nothing will happen?


Friction usually slows down objects in linear motions, but I don't know what it does on rotating objects.

What does a graph of a angular speed look like with constant angular acceleration?
 
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  • #2
hi asz304! :wink:
asz304 said:
Quick question, if an applied friction is applied on a pivot, will a rotating object slow down? or nothing will happen?

yes, there'll be a frictional https://www.physicsforums.com/library.php?do=view_item&itemid=175" :smile:
What does a graph of a angular speed look like with constant angular acceleration?

a graph of angular speed against time will be a straight line

(basically, angle and angular speed and angular acceleration obey exactly the same equations as position and ordinary speed and ordinary acceleration)
 
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FAQ: Friction on a pivot. Graph of motion w/ c.angular accel.

What is friction on a pivot?

Friction on a pivot refers to the resistance or force that occurs when an object is rotated or moved around a fixed point or axis.

How does friction affect the motion of an object on a pivot?

Friction on a pivot can cause a decrease in the speed and smoothness of an object's motion as it rotates around the pivot point. This is due to the opposing force generated by the pivot, which can slow down or stop the object's motion.

What is a graph of motion with constant angular acceleration?

A graph of motion with constant angular acceleration is a visual representation of an object's rotational motion over time. It shows the relationship between the object's angular velocity and time, and can also include information about angular acceleration and displacement.

How is the angular acceleration of an object on a pivot calculated?

The angular acceleration of an object on a pivot can be calculated by dividing the torque applied to the object by its moment of inertia. This is represented by the equation α = τ/I, where α is the angular acceleration, τ is the torque, and I is the moment of inertia.

What factors can affect the friction on a pivot?

The friction on a pivot can be affected by factors such as the surface material of the pivot and the object, the presence of lubricants, the weight and shape of the object, and the speed of rotation. Additionally, the coefficient of friction between the two surfaces can also impact the amount of friction on a pivot.

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