a beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]
Attached Figure / Diagram
A
32.0N
B
26.7N
C
16.0N
D
13.3N
Verified Correct Answer: D.
Physical Principles & Numerical Solution
E x 3 = 80 x 0.5
E3 = 40
E = \(\frac{40}{3} = 13.3N\)
Source: Myschool Past Questions Archive (Record #33883)