The ladder shown in figure has negligible mass and rest on frictionless floor. The angle between the two legs of ladder is 600. The fat person of 80kg is sitting on ladder. Find the contact force exerted by the floor and the tension in crossbar.

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Grade 12th passMechanics

The ladder shown in figure has negligible mass and rest on frictionless floor. The angle between the two legs of ladder is 60⁰. The fat person of 80kg is sitting on ladder. Find the contact force exerted by the floor and the tension in crossbar.

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Mayank Bhargava

7 Years agoGrade 12th pass

2 Answers

Eshan

7 Years ago

The vertical normal force will just try to balance the weight of the man from above. Hence 2N=mg
$\implies N=400$

Pratyush

7 Years ago

Contact force =N+N =2N

2N=80g. (g=9.8)

N=392

Torque equation for left side in earlier

So we take angle as 30°

N(2)tan30°=T(1)

2N*1/√3=T

T=2N/√3

T= 450N

If u take g = 10 then answer will be 470.58

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The ladder shown in figure has negligible mass and rest on frictionless floor. The angle between the two legs of ladder is 600. The fat person of 80kg is sitting on ladder. Find the contact force exerted by the floor and the tension in crossbar.

Mayank Bhargava

2 Answers

Eshan

Pratyush

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The ladder shown in figure has negligible mass and rest on frictionless floor. The angle between the two legs of ladder is 60⁰. The fat person of 80kg is sitting on ladder. Find the contact force exerted by the floor and the tension in crossbar.

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