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Standard VIII

Physics

Normal Force

A person of 4...

Question

A person of 40 $k g$ is managing to be at rest between $2$ vertical walls by pressing one wall A by his hands and feet and B with his back as shown in fie The coeff. of friction between his body and the wall is $0.8$ . The normal force exerted by the person is
$(g - 10 m / s^{2})$

250 N

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290 N

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100 N

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106 N

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Solution

The correct option is A $250 N$
$m g = μ$
$∴ 400 = 0.8 N$
$N = 500$
$∴$ Normal by each wall $= 250 N$
Hence,
option $A$ is correct answer.

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g = 10 m / s^{2})

Q. A person (40 kg) is managing to be at rest between two vertical walls by pressing one wall A by his hands and feet and the other wall B by his back (figure 6-E11). Assume that the friction coefficient between his body and the walls is 0.8 and that limiting friction acts at all the contacts. (a) Show that the person pushes the two walls with equal force. (b) Find the normal force exerted by either wall on the person. Take

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A person of 40kg is managing to be at rest between 2 vertical walls by pressing one wall A by his hands and feet and B with his back as shown in fie The coeff. of friction between his body and the wall is 0.8 . The normal force exerted by the person is(g−10m/s2)

The correct option is A 250Nmg=μ∴400=0.8NN=500∴ Normal by each wall =250N Hence,option A is correct answer.

A person of 40 $k g$ is managing to be at rest between $2$ vertical walls by pressing one wall A by his hands and feet and B with his back as shown in fie The coeff. of friction between his body and the wall is $0.8$ . The normal force exerted by the person is
$(g - 10 m / s^{2})$

The correct option is A $250 N$
$m g = μ$
$∴ 400 = 0.8 N$
$N = 500$
$∴$ Normal by each wall $= 250 N$
Hence,
option $A$ is correct answer.