This diagram shows a picture hanging symmetrically by two cords from a nail fixed to a wall. The picture is in equilibrium.

a. Explain what is meant by equilibrium.
b. Draw a vector diagram to represent the three forces acting on the picture in the vertical plane. Label each force clearly with its name and show the direction of each force with an arrow.
c. The tension in the cord is 45 N and the angle that each end of the cord makes with the horizontal is 50°. Calculate:
i. The vertical component of the tension in the cord
ii. The weight of the picture.

Transcribed Image Text:

nail cord 50° 50° Figure 4.38