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eurekameh
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I don't understand why the force is acting through a distance of 1.2pi, even though the center of the disk clearly moves a distance of 0.6pi.
eurekameh said:Isn't the force also causing a moment about the center of mass? Shouldn't this contribute to the work done?
eurekameh said:Translational and rotational kinetic energy. The force moves through a distance of 1.2pi. But it is also causing a moment through an angle of 2pi. Shouldn't this moment through an angle also be contributing to the total kinetic energy (translational and rotational) of the disk?
The work done on an object is equal to the change in its energy, and this change in energy is caused by a force acting on the object. In other words, work is the transfer of energy by a force.
In this scenario, the work done is calculated by multiplying the force by the distance through which it acts. So, the work done would be equal to 0.6pi times the force.
Yes, work can be negative. This happens when the force and the displacement of the object are in opposite directions. In this case, the work done is considered to be negative, which means that energy is being transferred away from the object.
In this scenario, the energy of the object does not change, as only half of the force is acting through the distance. Therefore, the object does not experience a change in energy.
Yes, it is possible. This can happen when the force is perpendicular to the displacement of the object. In this case, the force is not doing any work on the object, as the displacement is not in the same direction as the force.