Chapter 13 periodic motion Breaking glas A wineglass can be shattered by sound wave if the wave matches the ollapse of the Tacoma Narrows natural utor tIons the glass suspension bridge in America in 1940 p415
Chapter 13 periodic motion Collapse of the Tacoma Narrows suspension bridge in America in 1940 (p 415)
oscillation SHM Dam ped Forced oscillation oscillation dynamics kinematics Dynamic Kinematics Circle of equation equation reference Energy Superposition of shm
SHM dynamics kinematics Dynamic equation Circle of reference Kinematics equation oscillation Energy Superposition of shm Damped oscillation Forced oscillation
Chapter 13 periodic motion Key Terms periodic motion /oscillation restoring force Amplitude cycle Period Frequency angular frequency simple harmonic motion harmonic oscillator circle of reference Phasor phase angle simple pendulum
Key Terms: periodic motion / oscillation restoring force Amplitude cycle Period Frequency angular frequency simple harmonic motion harmonic oscillator circle of reference Phasor phase angle simple pendulum Chapter 13 periodic motion
Key Terms: physical pendulum Damping Damped oscillation Critical damping overdamping underdamping 〓〓〓 driving force forced oscillation natural angular frequency 删HH resonance chaotic motion chaos
Key Terms: physical pendulum Damping Damped oscillation Critical damping overdamping underdamping driving force forced oscillation natural angular frequency resonance chaotic motion chaos
1. Dynamic equation 1)dynamic equation Ideal model A spring mass system ∑F k x k k +x=0 d=x dt 2 m +02x=0 dt2 2丌 T x=AcOs(Ot+φ)
Ideal model: A. spring mass system 1) dynamic equation kx dt d x m F ma kx = − = = − 2 2 0 2 2 + x = m k dt d x x = Acos(t + ) 0 2 2 2 + x = dt d x m k = 2 T = 1. Dynamic equation