Recent content by swotty

  1. swotty

    Torque to lift object by cable on a drum accelerating

    Yes that's a possibility, the numbers give 11.16kNm but the radius of gyration is used to find the torque to accelerate the drum; the tension acts at the rim and therefore the couple is tension times the radius of the drum i.e. 1.25m
  2. swotty

    Hi There

    Thanks this is a friendly forum :smile:
  3. swotty

    Torque to lift object by cable on a drum accelerating

    Thanks for the welcome and yes I too make loads of them hence write above instead of right This question also does not specify information about the construction of the drum i.e. whether the drum is solid or a thin walled cylinder which changes the answer of course. I do a bit of part time...
  4. swotty

    Torque to lift object by cable on a drum accelerating

    Many thanks Tom for quick reply. I thought I was right but human nature being what it is you expect someone who has written a text book will get it write. I should learn though it's happened to me before. Regards Glyn
  5. swotty

    Hi There

    Hi Retired electronics engineer. love anything to do with technology, science, maths. Keeps the old brain ticking over. Still need help though in unfamiliar areas.
  6. swotty

    Torque to lift object by cable on a drum accelerating

    1. Homework Statement An object of mass 1000 kg is lifted by means of a steel lifting cable being wound round a drum of diameter 2.5m mounted on a horizontal shaft. The drum and shaft have a mass of 1000 kg and a radius of gyration of 1.0 m. What is the torque required to give the object an...
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