A force of 30 lbs is applied at point B 30 degrees CCW from the horizontal. Dete

Question

A force of 30 lbs is applied at point B 30 degrees CCW from the horizontal. Determine the moment about point A caused by the 30-lb force. Indicate if this moment is CW or CCW. 108.16 lb*ft; CCW 103.92 lb*ft; CW 73.92 lb*ft; CCW 108.16 lb*ft; CW 73.92 lb*ft; CW 30 lb*ft; CCW A force of 80 lbs is applied to point B in the orientation shown below. Assuming counter-clockwise as the positive direction, determine the moment about point A caused by the 80-lb force. Type your numerical answer in the space below and include the negative sign if appropriate. (Avoid spaces in your answer.) ________

Explanation / Answer

here,

7)

magnitude of force , F = 30 lbs

theta = 30 degree

r = 4 ft

the moment of force about A , M = r.F

M = r * F * cos(theta)

M = 4 * 30 * cos(30)

M = 103.92 lb.ft

and the direction is clockwise

so, the moment of force about A is 103.92 lb.ft CW

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