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4. The figure shows three forces acting on a pin-supported rectangular plate at points A, B, and C. Use the scalar method of computing moments in this problem. a. Compute the moment of the force at A about point D. b. Compute the magnitude and orientation (0 < 0 <180°) of the smallest force FB that creates the same moment about D that you found in part (a). c. Compute the magnitude of the horizontal force Fc that makes the resultant moment of these three forces about D equal to zero (i.e., use the angle and magnitude for FB you found in part (b)). 3 ft 27° 120 lb A 18 in D 30 in C 2 ft Fc

4. The figure shows three forces acting on a pin-supported rectangular plate at points A, B, and C. Use the scalar method of computing moments in this problem. a. Compute the moment of the force at A about point D. b. Compute the magnitude and orientation (0 < 0 <180°) of the smallest force FB that creates the same moment about D that you found in part (a). c. Compute the magnitude of the horizontal force Fc that makes the resultant moment of these three forces about D equal to zero (i.e., use the angle and magnitude for FB you found in part (b)). 3 ft 27° 120 lb A 18 in D 30 in C 2 ft Fc

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4. The figure shows three forces acting on a pin-supported rectangular plate at points A, B, and C. Use the scalar method of computing moments in this problem. a. Compute the moment of the force at A about point D. b. Compute the magnitude and orientation (0 < 0 <180°) of the smallest force FB that creates the same moment about D that you found in part (a). c. Compute the magnitude of the horizontal force Fe that makes the resultant moment of these three forces about D equal to zero (i.e., use the angle and magnitude for FB you found in part (b)). 3 ft 27° 120 lb 18 in 30 in B C 2 ft Fc 2011 FB.
Transcribed Image Text:4. The figure shows three forces acting on a pin-supported rectangular plate at points A, B, and C. Use the scalar method of computing moments in this problem. a. Compute the moment of the force at A about point D. b. Compute the magnitude and orientation (0 < 0 <180°) of the smallest force FB that creates the same moment about D that you found in part (a). c. Compute the magnitude of the horizontal force Fe that makes the resultant moment of these three forces about D equal to zero (i.e., use the angle and magnitude for FB you found in part (b)). 3 ft 27° 120 lb 18 in 30 in B C 2 ft Fc 2011 FB.
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