Find Projection Forces of 18 pounds and 13 pounds act on each other with an angle of 40°. The magnitude of the resultant force The resultant force has an angle of pounds. with the 18 pound force. The resultant force has an angle of with the 13 pound force. It is best to calculate each angle separately and check by seeing if they add to 40°.

Albert lives in New Orleans. At noon on a summer day, the angle of elevation of the sun is 84. The window in Alberts room is 4.0 feet high and 6.5 feet wide. (Sec Figure 24.) a. Calculate the area of the floor surface in Alberts room that is illuminated by the sun when the angle of elevation of the sun is 84. b. One winter day the angle of elevation of the sun outside Alberts window is 37. Will the illuminated area of the floor in Alberts room be greater on the summer day, or on the winter day? Figure 24