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  1. B

    Rotating reel with load driven by a motor

    Hi Physiona, Thank you for the reply. I understand how to solve the problem using the energy method. What I don't get is why my attempt at a solution is wrong.
  2. B

    Rotating reel with load driven by a motor

    Homework Statement If the motor M exerts a constant force of P = 300 N on the cable wrapped around the reels outer rim, determine the velocity of the 50 kg cylinder after it has traveled a distance 2 m. Initially the system is at rest. The reel has mass 25 kg, and the radius of gyration about...
  3. B

    Compression of a gas

    Yes, so I guess the problem is under-defined. If I assume that the gas is air the solution is obvious. Thank you for your help. I will mark this as solved.
  4. B

    Compression of a gas

    Unfortunately, the gas type is not mentioned :(
  5. B

    Compression of a gas

    Homework Statement [/B] A closed cylinder with a piston is used to compress gas that is initially at 1bar and temperature 293K. The compression is performed adiabatically until the volume is 1m3 and the pressure is 10bar, calculate the work done. Homework Equations [/B] pV = nR0T - ideal gas...
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