Recent content by johnpaul

  1. J

    Help (required force to move a sliding door weighing 100 kg with two rollers)

    hi, can anyone advise me what is the proper way in computing the friction between wheel and the axle? its just a simple door carrier(please refer to the drawings above). thanks
  2. J

    Help (required force to move a sliding door weighing 100 kg with two rollers)

    hi tim, hi molydood, please correct me if I am wrong. here's my computation: Weight of door=100 kg Number of wheels= 2 Weight per wheel =(100kg)/(2)= 50kg F1= αW / r F1- resistant force of a single wheel α - coefficient of rolling friction W - weight r - radius (0.015m)...
  3. J

    Help (required force to move a sliding door weighing 100 kg with two rollers)

    what is the required force to start moving a sliding door weighing 100 kg with two rollers. what are the forces acting on the system? shall i used rolling friction on this? what formula to use? thanks a lot.
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