a beam PQ pivoted at P carries a load of 80N as shown abo...
![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]](/img/aptitude-tests/questions/15156.jpg "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]")
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]
A.
32.0N
B.
26.7N
C.
16.0N
D.
13.3N
Correct answer is D
E x 3 = 80 x 0.5
E3 = 40
E = 403=13.3N