![]() Torque is the product of the distance from the point of rotation to where the force is applied x the force x the sine of the angle between the line you measure distance along and the line of the force: Note that the symbol for torque is the Greek letter tau. I will state the equation for torque in a slightly different way than the book does. When you open a door, where do you push? If you exert a force at the hinge, the door will not move the easiest way to open a door is to exert a force on the side of the door opposite the hinge, and to push or pull with a force perpendicular to the door. Similarly, to start something spinning, or to alter the rotation of a spinning object, a torque must be applied.Ī torque is a force exerted at a distance from the axis of rotation the easiest way to think of torque is to consider a door. To get something to move in a straight-line, or to deflect an object traveling in a straight line, it is necessary to apply a force. We've looked at the rotational equivalents of displacement, velocity, and acceleration now we'll extend the parallel between straight-line motion and rotational motion by investigating the rotational equivalent of force, which is torque. ![]() Torque and rotational inertia Torque and rotational inertia ![]()
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