Mechanical Engineering - Engineering Mechanics - Discussion

Discussion Forum : Engineering Mechanics - Section 6 (Q.No. 5)

Engineering Mechanics

A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

downward at its upper end

upward at its upper end

zero at its upper end

perpendicular to the wall at its upper end

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

12 comments Page 1 of 2.

Nizam said: 7 months ago

For a smooth wall no friction because the coefficient of friction is 0.

Hence option C.

Rameshpatel said: 4 years ago

At the point of vertical rough surface as soon as the ladder descends down the f will act upward tangential.

Vinod kumar said: 4 years ago

Agree, C is the right answer.

Ravindra vishwakarma said: 5 years ago

If any ladder is inclined against roughwall then friction act in both upward of vertical wall as well as towards it.

(1)

Mamdud said: 5 years ago

Friction can be less but not zero.

(1)

Omid said: 6 years ago

Why B is correct. The upper end is smooth so no friction. The given answer is right.

Ashish said: 7 years ago

There is no normal reaction at an upper end.

Uttu don said: 7 years ago

Option B is correct.

Sumi said: 7 years ago

I think the correct answer is B.

Lalit Swami said: 1 decade ago

Because the wall is smooth.

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