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Heavy Pulley

Pull a cord or hang a block on a heavy wheel. Find how fast it spins up.

Physics · Class 11 · Torque turns a wheel · 8 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Spin from rest: Steady α from rest: θ = ½αt²
  2. The third second: The angle in one second: θn = α(n − ½)
  3. Pull the rim: A torque spins a wheel: τ = Iα
  4. Block on a drum: A block and a drum move together: a = mg / (m + I/R²)
  5. Pull the cord off: Work becomes spin energy: Fs = ½Iω²
  6. Motor meter: From θ(t) to torque and power
  7. Falling pole: A pole falls about its hinge: Mg·L/2 = ½(ML²/3)ω²
  8. The tip beats g: The first moment: α = τ/I about the hinge