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A man of mass 40kg is at rest between th...

A man of mass `40kg` is at rest between the walls as shown in the If `'●'` between the man and the walls is `0.8` find the normal reactions exerted by the walls on the man .

Text Solution

Verified by Experts

Since man is at rest,

`N_(1)-N_(2)=0` (horizontal equilibrium)
`therefore N_(1)=N_(2)=N, F_(1)=F_(2)=F" (say)"`
`therefore 2muN=mg" (vertical equilibrium)"`
`=2xx0.8xxN=400 therefore N=250N`
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NARAYNA-LAW OF MOTION-EXERCISE - IV
  1. A man of mass 40kg is at rest between the walls as shown in the If '●'...

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  2. When a body is stationary:

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  3. The inertia of a moving object depends on:

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  4. A thief stole a box full of valuable articles of weight W and while ca...

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  5. There are three Newton's laws of motion namely I, II and III : we can ...

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  6. Two blocks m(1) = 5 g and m(2)= 10 g are hung vertically over a light ...

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  7. In the figure a smooth pulley of negligible weight is suspended by a s...

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  8. Two masses 2 kg and 3 kg are attached to the end of the string passed ...

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  9. Two bodies of mass 6 kg and 4 kg are tied to a string as shown in the ...

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  10. The pulley arrangements shown in figure are identical, the mass of the...

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  11. A string of negligible mass going over a clamped pulley of mass m supp...

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  12. Two masses of 8 kg and 4 kg are connected by a string as shown in figu...

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  13. An empty plastic box of mass m is found to accelerate up at the rate o...

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  14. A monkey is decending from the branch of a tree with constant accelera...

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  15. Fig. shows a system of three masses being pulled with a force F. the m...

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  16. Fig. shows a block of mass m(1) resting on a smooth surface. It is con...

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  17. A 100 kg block is suspended with the help of three strings A, B and C....

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  18. A frictionless inclined plane of length l having inclination theta is ...

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  19. Friction

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  20. A box is placed on an inclined plane and has to be pushed down.The ang...

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  21. Figure shows two block A and B pushed against the wall with the force ...

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