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A cantilever ABC, 5 m long is propped by a force of 8 kN at free end as shown in figure (a). It carries a UDL of 4 kN/m over BC = 3 m.
The point of contra-flexure is
  • a)
    2 m from the left support
  • b)
    4.5 m from the left support
  • c)
    1 m from the right support
  • d)
    no point of contra flexure
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A cantilever ABC, 5 m long is propped by a force of 8 kN at free end ...
Reaction at C, RC = −8 + 12 = +4 kN (upwards) ↑
SF diagram: Portion AB(x = 0 to 2 m)
FAB = +8 kN (constant)
(Taking upward forces on the left side of the section to be positive)
Portion BC (x = 2 to 5 m)
Fx = 8 − 4 (x − 2)
= 0 at x = 4 m
= −4 kN at x = 5
Figure (b) shows SF diagram.
BM diagram: Portion AB (x = 0 to 2 m)
Mx = +8x
= 0 at x = 0 m
= 16 kNm at x = 2 m
Portion BC (x = 2 to 5 m)
There is no point of contra-flexure in the cantilever.
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Most Upvoted Answer
A cantilever ABC, 5 m long is propped by a force of 8 kN at free end ...
Reaction at C, RC = −8 + 12 = +4 kN (upwards) ↑
SF diagram: Portion AB(x = 0 to 2 m)
FAB = +8 kN (constant)
(Taking upward forces on the left side of the section to be positive)
Portion BC (x = 2 to 5 m)
Fx = 8 − 4 (x − 2)
= 0 at x = 4 m
= −4 kN at x = 5
Figure (b) shows SF diagram.
BM diagram: Portion AB (x = 0 to 2 m)
Mx = +8x
= 0 at x = 0 m
= 16 kNm at x = 2 m
Portion BC (x = 2 to 5 m)
There is no point of contra-flexure in the cantilever.
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A cantilever ABC, 5 m long is propped by a force of 8 kN at free end as shown in figure (a). It carries a UDL of 4 kN/m over BC = 3 m.The point of contra-flexure isa) 2 m from the left supportb) 4.5 m from the left supportc) 1 m from the right supportd) no point of contra flexureCorrect answer is option 'D'. Can you explain this answer?
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A cantilever ABC, 5 m long is propped by a force of 8 kN at free end as shown in figure (a). It carries a UDL of 4 kN/m over BC = 3 m.The point of contra-flexure isa) 2 m from the left supportb) 4.5 m from the left supportc) 1 m from the right supportd) no point of contra flexureCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A cantilever ABC, 5 m long is propped by a force of 8 kN at free end as shown in figure (a). It carries a UDL of 4 kN/m over BC = 3 m.The point of contra-flexure isa) 2 m from the left supportb) 4.5 m from the left supportc) 1 m from the right supportd) no point of contra flexureCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A cantilever ABC, 5 m long is propped by a force of 8 kN at free end as shown in figure (a). It carries a UDL of 4 kN/m over BC = 3 m.The point of contra-flexure isa) 2 m from the left supportb) 4.5 m from the left supportc) 1 m from the right supportd) no point of contra flexureCorrect answer is option 'D'. Can you explain this answer?.
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