Part I. Shorter problems focused on the fundamentals a. For the image at the right, the coordinate angles are a = 57°, ẞ= 121°, y=49°, and the point along a-a is (15,-6,3). What is the angle between lines a-a and b-b? Z b-b B LL F a (x,y,z) a-a Y b. If the magnitude of the force, F-3121bf, what is the magnitude projected along the a-a axis? y

Question 3) On the  plate in the figure, the length  L  is given as L=72 m . According to this; Question 3-A)  Find the X coordinate of the     geometric center of the plate  . ( Enter your result without writing m units. Write at least three digits after the comma.) Question 3-B)  Find the Y coordinate of the     geometric center of the plate  . (Your result m in size Enter the writing unit. Enter the form of at least three digits after comma.)

Question 3) On the plate in the figure, the length L is given as L = 18 m . According to this; y 2L L 2L 3 L -- L Question 3-A) Find the X coordinate of the geometric center of the plate. (Enter your result as m without writing units.) Response: Question 3-B) Find the Y coordinate of the geometric center of the plate . (Enter your result as m without writing units.) Response:

Based on the figure identify only the relative polar coordinate of each point. The answer would be in (x<degree form)