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    • https://phys.libretexts.org/Bookshelves/Classical_Mechanics/Classical_Mechanics_(Dourmashkin)/19%3A_Angular_Momentum/19.05%3A_Angular_Impulse_and_Change_in_Angular_Momentum
      \[\overrightarrow{\mathbf{J}}_{S}=\int_{t_{i}}^{t_{f}} \vec{\tau}_{S} d t=\int_{t_{i}}^{t_{f}} \frac{d \overrightarrow{\mathbf{L}}_{S}}{d t} d t=\Delta \overrightarrow{\mathbf{L}}_{S}=\overrightarrow{...JS=tftiτSdt=tftidLSdtdt=ΔLS=LS,fLS,i
    • https://phys.libretexts.org/Bookshelves/Classical_Mechanics/Classical_Mechanics_(Dourmashkin)/19%3A_Angular_Momentum/19.09%3A_External_Angular_Impulse_and_Change_in_Angular_Momentum
      Now suppose the collision is not instantaneous but that the frictional torque is independent of the speed of the rotor. (c) What is the angular impulse during the collision? (d) What is the angular ve...Now suppose the collision is not instantaneous but that the frictional torque is independent of the speed of the rotor. (c) What is the angular impulse during the collision? (d) What is the angular velocity ωb of the two washers immediately after the collision is finished (when the washers rotate together)? (e) What is the angular deceleration α2 after the collision?

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