2Oscillations pre-question Is a bouncing ball an example of simple harmonic motion?YesNo
3Oscillations pre-question Two kids are swinging on two swings of the same height – one kid is a little chubbier than the other. Neglecting frictional forces, which kid completes a back and forth swing in the fastest time?A) The chubby kidB) The skinny kidC) The kid who pushes off the ground the bestD) Both complete in the same time
4Outline for Oscillations Simple Harmonic MotionPosition, Velocity, AccelerationForceEnergyResonance and Damping
5Oscillations and Periodic Motion Simple Harmonic Motion1) About Equil.2) Periodic3) Sinusoidal
6Discussion: Examples of SHM? Mass on a SpringPendulumSnowboarder in halfpipeBungee jumperChild on swingBobble head doll?
9Discussion: PhaseYour book says that displacement is in terms of cosine and I just said that it is in terms of sine? Who is right?There is also a phase term (φ) that let’s you set the initial condition.If the oscillation starts at A it is a sine with a φ=90 degrees or a cosinewith a φ=0 degrees.