Question 2 You are holding a thin and weightless bar on your head (see figure 2.1). On the extremity 4, the bar is attached to an elastic spring with unstressed length of 1 m and spring constant, k = 50 N/m; on the other extremity D, the bar is against a wall. On point C, a force F is applied, forming a 45-degree angle with the bar. Assign the length AE according to the height of your body. (a) What is the magnitude of the force F for the bar to rest horizontally? (b) If the force ♬ was removed, what support would you need in D in place of the wall, in order to keep the bar at rest horizontally? Justify your suggestion(s). State and justify your assumptions and comment on your solutions. 2m Im Im F = C D

Elements Of Electromagnetics
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Question 2
You are holding a thin and weightless bar on your head (see figure 2.1). On the
extremity 4, the bar is attached to an elastic spring with unstressed length of 1 m and
spring constant, k = 50 N/m; on the other extremity D, the bar is against a wall. On
point C, a force F is applied, forming a 45-degree angle with the bar. Assign the
length AE according to the height of your body.
(a) What is the magnitude of the force F for the bar to rest horizontally?
(b) If the force F was removed, what support would you need in D in place of the
wall, in order to keep the bar at rest horizontally? Justify your suggestion(s).
State and justify your assumptions and comment on your solutions.
2m
Im
Im
.....
F
4m
Figure 2.1
C
D
Transcribed Image Text:Question 2 You are holding a thin and weightless bar on your head (see figure 2.1). On the extremity 4, the bar is attached to an elastic spring with unstressed length of 1 m and spring constant, k = 50 N/m; on the other extremity D, the bar is against a wall. On point C, a force F is applied, forming a 45-degree angle with the bar. Assign the length AE according to the height of your body. (a) What is the magnitude of the force F for the bar to rest horizontally? (b) If the force F was removed, what support would you need in D in place of the wall, in order to keep the bar at rest horizontally? Justify your suggestion(s). State and justify your assumptions and comment on your solutions. 2m Im Im ..... F 4m Figure 2.1 C D
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