Torque and center of mass question

In summary: I don't know what happened. :(In summary, the baseball player is holding a bat with one hand and the weight is acting along a line 60 cm to the right of the bat's equilibrium point. The bat has a torque exerted on it and the player is trying to solve for it.
  • #1
semaj810
6
0

Homework Statement


A baseball player holds a 36-ounce bat (weight = 10.0 Newton) with one hand at the point O. The bat is in equilibrium. The weight of the bat acts along a line 60 centimeters to the right of O. What is the torque exerted on the center of mass of the bat by the player?


Homework Equations


Unsure


The Attempt at a Solution


I don't understand it
 
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  • #2
Is there a picture associated with your problem?
 
  • #3
semaj810 said:

Homework Statement


A baseball player holds a 36-ounce bat (weight = 10.0 Newton) with one hand at the point O. The bat is in equilibrium. The weight of the bat acts along a line 60 centimeters to the right of O. What is the torque exerted on the center of mass of the bat by the player?


Homework Equations


Unsure


The Attempt at a Solution


I don't understand it
You say the bat is in equilibrium? I don't see why the player would be exerting any torque on the bat.
 
  • #4
Based on this and some of your other posts, it sounds like you need to read up on torques.

http://en.wikipedia.org/wiki/Moment_(physics )

If you have a bat held at one end, like a cantilevered beam, the weight of the bat is not acting through the location of the support. In your problem, it tells you that the weight is acting through a point that is 60 cm away from the bat. Presumably, since no angle is given, the bat is horizontal and the angle between your position and force vectors is 90 degrees (which can simplify the problem a little bit).

In this case, the reaction at the baseball player's hand will consist of a force and a torque to keep the bat in equilibrium.

Does this help at all?

At what level are you studying?

-Kerry
 
Last edited by a moderator:
  • #5
The origin is the end of the bat so its acting 60 centimeters away from the origin. Just clarifying.
 
  • #6
Yes - thanks for the clarification, wesDOT. I should have said that the weight is acting 60 cm away from the baseball player's hand.

-Kerry
 
  • #7
l12g23.gif


That is the image he should have posted
 

1. What is torque?

Torque is the measure of a force's ability to rotate an object around an axis. It is calculated by multiplying the force applied by the distance from the axis to the point where the force is applied.

2. How is torque related to center of mass?

Center of mass is the point at which an object's mass is evenly distributed in all directions. Torque is used to determine the stability of an object by comparing the location of its center of mass to the point at which a force is applied. If the force is applied at the center of mass, there will be no torque and the object will remain in equilibrium.

3. Can torque change an object's center of mass?

No, torque cannot change an object's center of mass. The center of mass is determined by the distribution of an object's mass, and torque only affects an object's rotational motion.

4. How does the distribution of mass affect an object's center of mass?

The center of mass of an object is affected by the distribution of its mass. If more mass is concentrated in one area, the center of mass will be closer to that area. If the mass is evenly distributed, the center of mass will be in the geometric center of the object.

5. How can torque be increased or decreased?

Torque can be increased by increasing the force applied or by increasing the distance from the axis to the point where the force is applied. It can be decreased by decreasing the force or the distance from the axis.

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