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Dynamics Of Rigid Bodies2D

Kinematics of Particles - Theory & Concepts - Radial Transverse

Study of the geometry of motion of particles without considering the forces causing the motion, including rectilinear and curvilinear motion.

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Mathematical Kinematics

Velocity components:
vr=r˙=20.0 m/sv_r = \dot{r} = 20.0\text{ m/s}
vθ=rθ˙=(120)(0.50)=60.0 m/sv_\theta = r\dot{\theta} = (120)(0.50) = 60.0\text{ m/s}
v=vr2+vθ2=63.2 m/sv = \sqrt{v_r^2 + v_\theta^2} = 63.2\text{ m/s}
Acceleration (r¨=0,θ¨=0\ddot{r}=0, \ddot{\theta}=0):
ar=rθ˙2=(120)(0.50)2=30.0 m/s2a_r = -r\dot{\theta}^2 = -(120)(0.50)^2 = -30.0\text{ m/s}^2
aθ=2r˙θ˙=2(20)(0.50)=20.0 m/s2a_\theta = 2\dot{r}\dot{\theta} = 2(20)(0.50) = 20.0\text{ m/s}^2
a=ar2+aθ2=36.1 m/s2a = \sqrt{a_r^2 + a_\theta^2} = 36.1\text{ m/s}^2
Polar Grid Kinematics Space50m100m150m200m90°180°270°Ov_rv_θva_ra_θ
vrv_r (Radial Velocity)
vθv_\theta (Transverse Velocity)
vv (Total Velocity)
ara_r (Radial Accel.)
aθa_\theta (Transverse Accel.)