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Rotor: Torque, Moment of Inertia and Angular Momentum

  • Physics
  • Class 11
  • 3D model
  • English

Rotor: Torque, Moment of Inertia and Angular Momentum: a 3D model for Class 11 Physics, covering Torque about the axle is tau = r F sin(theta): it depends on the force…, A force along the arm (theta = 0) gives zero torque and adds no angular acceleration, however large it is., The torque vector points along the axle; by the right-hand rule it points up when the force turns the rotor…, Moment of inertia I = I0 + sum of m r squared depends on how far the mass is from the axis…, While I is fixed, angular acceleration alpha = net torque / I….

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Also called

rotational mechanics · rotational motion · system of particles and rotational motion · torque · moment of force · moment of inertia · rotational inertia · angular acceleration · angular velocity · angular momentum · conservation of angular momentum · torque and angular acceleration · tau = I alpha · right hand rule · rotational kinetic energy · lever arm · moment arm · fixed axis rotation · rotor · spinning skater · ice skater arms

Topics

  • Torque about the axle is tau = r F sin(theta): it depends on the force…
  • A force along the arm (theta = 0) gives zero torque and adds no angular acceleration, however large it is.
  • The torque vector points along the axle; by the right-hand rule it points up when the force turns the rotor…
  • Moment of inertia I = I0 + sum of m r squared depends on how far the mass is from the axis…
  • While I is fixed, angular acceleration alpha = net torque / I…
  • Net external torque changes angular momentum: dL/dt = tau. With no external torque L = I omega stays constant.
  • Pulling the masses inward with no torque lowers I, so omega rises by the same factor (here about 4.2 times).
  • Kinetic energy is not conserved when the masses move inward: the actuator does positive work equal to the rise in one…

About this model

A GLB file of about 892 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Rotor, axle, masses, actuator, vectors, gauges and all physics-driven motion: made for Lably. | Original Lably model: all geometry, materials and motion authored for Lably. No third-party assets are included.

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