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A heavy wheel of radius 20 cm and weight...

A heavy wheel of radius `20 cm` and weight `10 kg` is to be dragged over a step of height `10 cm`, by a horizontal force `F` applied at the centre of the wheel. The minimum value of `F` is

A

20kgwt

B

1kgwt

C

`10sqrt(3)`kgwt

D

`10sqrt(2)`kgwt

Text Solution

Verified by Experts

The correct Answer is:
C
clockwise torque = anticlockwise torque : ` mg sqrt((20)^(2)-(10)^(2) ) = F (20 -10)`
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - II (H.W)
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  2. A uniform meter scale of mass 1kg is placed on table such that a part ...

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  3. A heavy wheel of radius 20 cm and weight 10 kg is to be dragged over a...

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  4. A wheel has a speed of 1200 revolution per minute and is made to slow ...

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  5. Point a rod b ( l = 2m) is moved upwards against a wall with veloci...

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  6. A wheel having radius 10 cm is coupled by a belt to another whe...

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  7. A uniform meter scale of mass 1kg is placed on table such that a part ...

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  8. A cubical block of mass m and side L resets on a rough horizontal...

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  9. Two circular rings each of mass M and radius R are attached to eac...

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  10. If I(1) is moment of inertia of a thin rod about an axis perpendicular...

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  11. The mass of a thin circular plate is M and its radius is R. About an a...

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  12. Two small spheres of mass 5kg and 15 kg are joined by a rod of length ...

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  13. Ratio of densities of materials of two circular discs of same mass and...

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  14. The moment of inertia of ring about an axis passing through its diamet...

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  15. The moment of inertia of a solid cylinder about its natural axis is I....

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  16. A thin rod of mass 6 m and length 6L is bent into regular hexagon. The...

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  17. Three solid spheres each of mass P and radius Q are arranged as ...

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  18. Three point masses m(1),m(2),m(3) are placed at three corners of an ...

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  19. A circular disc of radius R and thickness R//6 has moment of inertia I...

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  20. Three rods each of mass m and length L are joined to form an equila...

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