# number 5 LULILULUI. E. 5. (10 points) A uniform board of a length 6 m supported...

number 5  LULILULUI. E. 5. (10 points) A uniform board of a length 6 m supported at the middle as shown in Figure 3. Find the location of the force Fz if the board is in equilibrium. 6. (10 points) A uniform solid disk in Figure 4 with mass 20 kg and radius 0.1 m
12=2.3m Fi=50 N | 1;=? A F3=80N Fig. 3 F2=150 N

Bar is supported at the middle so

l1 = distance of force 1 = 3 m

now given that bar is in equilibrium so moment balance about support

l1 * F1 + l3 * F3 = l2 * F2

3 * 50 + l3 * 80 = 2.3 * 150

l3 = 2.4375 m

feel free to drop comment if you have any doubt.

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