Draw the free body diagram.Picture 33Here,  is the vertical component of force,  is the horizontal component of force,  is the horizontal distance from point A to B,  is the vertical distance from point A to B, and  is the angle.Step 2 of 5From the figure,Similarly,Step 3 of 5Calculate the horizontal component of force.Here,  is the applied force.Substitute,  for  and  for  in the formula above.Step 4 of 5Calculate the vertical component of force.Substitute,  for  and  for  in the formula above.Step 5 of 5Calculate the moment at point B .Substitute,  for ,  for ,  for , and  for  in the equation above.Therefore, the moment at point B is .