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CHAPTER 10 : DYNAMICS OF ROTATIONAL MOTION, CHEE ZI QING A20SC0043 -…
CHAPTER 10 : DYNAMICS OF ROTATIONAL MOTION
Angular Momentum - Objects Rotating About a Fixed Axis
Torque, τ= dL/dt = rF (unit:kg⋅m2⋅s−2)
Angular momentum, L=Iω = rp = rmv(unit:kg m2 s−1)
when moment of inertia,I is large, ω is small
no external torque = angular momentum conserved
Angular Momentum is vector (magnitude+direction)
Vector Cross Product; Torque as a Vector
Torque (Vector) can be defined using right hand rule
cross product can be written in determinant form
Angular Momentum of a particle
Angular Momentum and Torque for a System of Particles; General Motion
Angular Momentum and Torque for a Rigid Object
Angular momentum, L=Iω
torque keeps an unbalanced system rotate
no L when rotational imbalanced
Conservation of Angular Momemtum
If no external torque acting on the system is zero, total angular momentum of a system remains constant
CHEE ZI QING A20SC0043
