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A drum with a diameter of 1.5 m is rotating at 200 r/min. A brake is applied to the drum, absorbing 80 kW of power. Calculate the angular velocity of the drum and the brake torque transmitted.

Physics

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Step-by-step solution

2 steps
  1. Calculate the angular velocity of the drum.

    The drum rotates at N=200N = 200 r/min.
    The angular velocity ω\omega in rad/s is given by:

    ω=2πN60\omega = \frac{2 \pi N}{60} ω=2π×20060=400π60=20π3 rad/s\omega = \frac{2 \pi \times 200}{60} = \frac{400 \pi}{60} = \frac{20 \pi}{3} \text{ rad/s} ω≈20.944 rad/s\omega \approx 20.944 \text{ rad/s}
  2. Calculate the brake torque transmitted (2.1).

    The power absorbed P=80P = 80 kW

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