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What is a flywheel ?...

What is a flywheel ?

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A disc with a large amount of inertia is called a flywheel.
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A cord of negligible mass is wound round the rim of a fly wheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord as shown in Fig. 7.35. The flywheel is mounted on a horizontal axle with frictionless bearings. (a) Compute the angular acceleration of the wheel. (b) Find the work done by the pull, when 2m of the cord is unwound. (c) Find also the kinetic energy of the wheel at this point. Assume that the wheel starts from rest. (d) Compare answers to parts (b) and (c).

SUBHASH PUBLICATION-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-NUMERICAL WITH SOLUTIONS
  1. What is a flywheel ?

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  2. A non-uniform bar of weight 'w' is suspended at rest by two strings of...

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  3. A solid sphere of mass 2kg is rolling down an inclined plane of angle...

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  4. If the Earth were to suddenly contact to half its present radius, by h...

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  5. If a force of vecF=-3veci+vecj+5veck acts at a point vecr=7veci+3vecj+...

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  6. The maximum and minimum distance of a comet from the sun are 1.4xx10^(...

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  7. Calculate the angular speed of rotation of the Earth

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  8. Calculate the angular speeds of the second, minute and hour hands of a...

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  9. Four spheres each of diameter 0.02m and 0.10 kg are placed with their ...

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  10. A flywheel initially rotating at 120 rpm retards and its angular speed...

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  11. A uniform solid rod of mass 40kg and length 10m rests against a vertic...

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  12. An oxygen molecule has a mass of 5.30xx10^(-26) kg and a moment of ine...

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  13. A solid cylinder rolls up an inclined plane of angle of inclination 30...

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  14. A solid cylinder rolls up an inclined plane of angle of inclination 30...

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  15. A solid rolls down two different inclined planes of the same heights b...

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  16. A solid rolls down two different inclined planes of the same heights b...

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  17. A solid rolls down two different inclined planes of the same heights b...

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  18. A rope of negligible mass is wound round a hollow cylinder of mass 5 k...

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  19. A car weighs 1800kg. The distance between its front and back axles is ...

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  20. A metre stick is balanced on knife edge at its centre . When two coins...

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  21. In the HCl molecule, the separation between the nuclei of the two atom...

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