Lakshya Education MCQs

Question: A weight of 100 kg is supported by a string whose ends are attached to pegs ‘a’ and ‘b’ at the same level shown in below figure. the tension in the string is
Options:
A. 50 kg
B. 750 kg
C. 100 kg
D. 120 kg
Answer: Option C

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Question 1. Two parallel forces 20 kg and 15 kg act. in order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by
  1.     5.5 kg
  2.     6.25 kg
  3.     8.75 kg
  4.     10.5 kg
Answer: Option C
Question 2. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. the tension in the string is
  1.     17.5 kg
  2.     19.5 kg
  3.     22.5 kg
  4.     25 kg
Answer: Option C
Question 3. A 50 kg boy climbs up a 8 m rope in gymnasium in 10 sec. the average power developed by the boy is approximately
  1.     400 watts
  2.     500 watts
  3.     4000 watts
  4.     None of these
Answer: Option A
Question 4. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?
  1.     Howe truss
  2.     King post truss
  3.     Fink truss
  4.     Warren truss
Answer: Option C
Question 5. A weight of 100 kg is supported by a string whose ends are attached to pegs ‘a’ and ‘b’ at the same level shown in below figure. the tension in the string is
  1.     50 kg
  2.     750 kg
  3.     100 kg
  4.     120 kg
Answer: Option C
Question 6. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. the tension in the string is
  1.     17.5 kg
  2.     19.5 kg
  3.     22.5 kg
  4.     25 kg
Answer: Option C

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