Question: A force is applied to a doorknob. This force will be most effective in causing the door to rotate when which of the following is

A force is applied to a doorknob. This force will be most effective in causing the door to rotate when which of the following is true? O The lever arm length is zero meters. O The direction of the force is at an angle of 450 with respect to the door. O The direction of the force is at an angle of 90 with respect to the door. O The lever arm is parallel to the direction of the force

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