Question

An experimental device imparts a force of magnitude F = 40 lb to the front edge of the rim at A to simulate the effect of a slam dunk. Compute the moment of the force F about point O and about point B. The moments are positive if counterclockwise, negative if clockwise. Finally, locate a point C from the base at O to the location on the ground where the force imparts zero moment. The distance d from point O to point C is positive if C is to the right of O, and negative if to the left.

Answer 1

To calculate the moment of force about point O and B, we use the formula M = r x F. The moment is positive if counterclockwise and negative if clockwise. To find the point C where the force imparts zero moment, we equate the moments of the force about point O and C.

Step-by-step explanation:

To calculate the moment of force, we need to consider the distance between the force application point and the point about which the moment is being calculated. For the moment of force F about point O, we can use the formula M = r x F, where r is the distance from point O to the application point of the force. In this case, the moment of force about point O will be negative since it is clockwise.

To calculate the moment of force F about point B, we use the same formula M = r x F, where r is the distance from point B to the application point of the force. In this case, the moment of force about point B will be positive since it is counterclockwise.

To locate a point C where the force imparts zero moment, we need to find the distance d from point O to point C. This can be found by equating the moments of the force about point O and point C. Set the moment of force about point O equal to zero and solve for d.

Answer 2

Please see attached picture for answer an explanation.