Will a Floating Disk Rotate or Move Linearly if Force is Applied off Center?

  • Thread starter Thread starter freephoton
  • Start date Start date
  • Tags Tags
    Torque Weird
AI Thread Summary
Applying a force off-center on a floating disk will result in both linear movement and rotation. The disk's center of mass is free to move, which allows for this dual response. The absence of a fixed axis or force couple does not negate the rotational effect. The consensus is that the disk will not only translate but also spin due to the applied force. Understanding these dynamics is crucial in analyzing the motion of rigid bodies in space.
freephoton
Messages
2
Reaction score
0
if a rigid body, let's say a disk,is floating in space and we exert a force outside its center of mass will it rotate or just start a linear move? its center of mass is free to move.sorry if my English are not so good.I hope that you understood the question
 
Physics news on Phys.org
freephoton said:
if a rigid body, let's say a disk,is floating in space and we exert a force outside its center of mass will it rotate or just start a linear move? its center of mass is free to move.sorry if my English are not so good.I hope that you understood the question

It will do both.
 
thanks for the reply Chestermiller! Thats also what i think but because there is not fixed axis or a force couple i was not really sure.
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Thread 'Beam on an inclined plane'
Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
Back
Top