Mechanics Homework | 9-4 232 - Moment of a force about points O and B | Name_______________ |

Mr. Haynes | Date_______________ |

**Problem 9-4** In Fig. P-231, the moment of a certain force F is 180 ft·lb clockwise about O and 90 ft·lb counterclockwise about B. If its moment about A is zero, determine the force.