The girl has a mass of 45kg and center of mass at G. (Figure 1) If she is swinging to a maximum height defined by theta = 60, determine the force developed along each of the four supporting posts such as AB at the instant theta = 0.

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?