mikefitz said:question; where does t=rF come from? it is not found on my equation sheet...
Torque is a measure of the turning or twisting force on an object. It is calculated by multiplying the force applied to an object by the distance from the point of rotation to the point where the force is applied.
To calculate the torque of a uniform door due to its own weight, you will need to know the weight of the door, the distance from the hinges to the center of gravity of the door, and the angle at which the door is open. The formula for calculating torque in this case is torque = weight x distance x sin(angle).
The center of gravity of a door is the point at which the weight of the door is evenly distributed. In most cases, this is near the midpoint of the door.
The angle of the door affects the torque calculation because as the angle increases, the distance from the point of rotation to the point where the force is applied also increases. This means that at a larger angle, the door will exert a greater torque due to its own weight.
Calculating the torque of a door is important to ensure that the door is properly installed and functioning correctly. It can also help to determine the amount of force required to open or close the door, and can be useful in designing door hinges and other hardware.